February 2006 1 M9999-022106
MIC2212 Micrel, Inc.
MIC2212
Dual µCap LDO and Power-On Reset
General Description
The MIC2212 is a dual µCap low dropout regulator with
power-on reset circuit. The first regulator is capable of sourcing
150mA, while the second regulator can source up to 300mA
and includes a power-on reset function.
Ideal for battery operated applications, the MIC2212 offers 1%
accuracy, extremely low dropout voltage (80mV @ 100mA),
and extremely low ground current, only 48µA total. Equipped
with TTL-logic-compatible enable pins, the MIC2212 can be
put into a zero-off-mode current state, drawing no current
when disabled.
The MIC2212 is a µCap design, operating with very small
ceramic output capacitors for stability, reducing required
board space and component cost.
The MIC2212 is available in fixed output voltages in the
10-pin 3mm × 3mm MLF™ leadless package.
Typical Application
VIN
EN1
EN2
CBYP
SET
Baseband
µProcessor
VOUT1 VI/O
VOUT2
POR
VCORE
/RST
GND
MIC2212-xxBML
C
OUT
= 1µF
Ceramic
Sets del ay for POR
Li-Ion
Battery
MIC2212 Typical Cell Phone Application
Features
• Input voltage range: 2.25V to 5.5V
• Stable with ceramic output capacitor
• 2 LDO outputs
• Output 1 – 150mA output current
• Output 2 – 300mA output current
• Power-on reset function with adjustable delay time
• Low dropout voltage of 80mV @ 100mA
• Ultra-low quiescent current of 48µA
• High output accuracy:
• +1.0% initial accuracy
• +2.0% over temperature
• Thermal shutdown protection
• Current limit protection
• Tiny 10-pin 3mm × 3mm MLF™ package
Applications
• Cellular/PCS phones
• Wireless modems
• PDAs
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
MicroLeadFrame and MLF are trademarks of Amkor Technology.
MIC2212 Micrel, Inc.
M9999-022106 2 February 2006
Ordering Information
Part Number Voltage*
(Vo1/Vo2)
Junction Temp.
Range
Package
Full Manufacturing Pb-Free
MIC2212-1.6/2.8BML MIC2212-WMBML MIC2212-WMYML 1.6V/2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.6/3.3BML MIC2212-WSBML MIC2212-WSYML 1.6V/3.3V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.8/2.6BML MIC2212-GKBML MIC2212-GKYML 1.8V/2.6V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.8/2.7BML MIC2212-GLBML MIC2212-GLYML 1.8V/2.7V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.8/2.8BML MIC2212-GMBML MIC2212-GMYML 1.8V/2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.8/3.3BML MIC2212-GSBML MIC2212-GSYML 1.8V/3.3V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.85/2.85BML MIC2212-DNBML MIC2212-DNYML 1.85V/2.85V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-1.85/2.9BML MIC2212-DOBML MIC2212-DOYML 1.85V/2.9V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.5/3.3BML MIC2212-JSBML MIC2212-JSYML 2.5V/3.3V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.6/2.8BML MIC2212-KMBML MIC2212-KMYML 2.6V/2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.6/2.85BML MIC2212-KNBML MIC2212-KNYML 2.6V/2.85V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.7/2.8BML MIC2212-LMBML MIC2212-LMYML 2.7V2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.7/2.9BML MIC2212-LOBML MIC2212-LOYML 2.7V/2.9V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.7/3.0BML MIC2212-LPBML MIC2212-LPYML 2.7V/3.0V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.8/2.6BML MIC2212-MKBML MIC2212-MKYML 2.8V/2.6V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.8/2.8BML MIC2212-MMBML MIC2212-MMYML 2.8V/2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.8/3.0BML MIC2212-MPBML MIC2212-MPYML 2.8V/3.0V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-2.85/2.85BML MIC2212-NNBML MIC2212-NNYML 2.85V/2.85V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.0/2.8BML MIC2212-PMBML MIC2212-PMYML 3.0V/2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.0/2.85BML MIC2212-PNBML MIC2212-PNYML 3.0V/2.85V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.0/3.0BML MIC2212-PPBML MIC2212-PPYML 3.0V/3.0V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.0/3.3BML MIC2212-PSBML MIC2212-PSYML 3.0V/3.3V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.3/1.8BML MIC2212-SGBML MIC2212-SGYML 3.3V/1.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.3/2.5BML MIC2212-SJBML MIC2212-SJYML 3.3V/2.5V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.3/2.8BML MIC2212-SMBML MIC2212-SMYML 3.3V/2.8V -40°C to +125°C 10-Pin 3x3 MLF™
MIC2212-3.3/3.6BML MIC2212-SVBML MIC2212-SVYML 3.3V/3.6V -40°C to +125°C 10-Pin 3x3 MLF™
* For other output voltage options, contact Micrel marketing.
Voltage Code
Adj. A
1.5 F
1.6 W
1.8 G
1.850 D
1.9 Y
2.0 H
2.1 E
2.5 J
2.6 K
2.7 L
Voltage Code
2.8 M
2.850 N
2.9 O
3.0 P
3.1 Q
3.2 R
3.3 S
3.4 T
3.5 U
3.6 V
Table 1. Voltage Codes
February 2006 3 M9999-022106
MIC2212 Micrel, Inc.
Pin Description
Pin Number Pin Name Pin Function
MLF-10 (3x3)
1 VIN Supply Input: (VIN1 and VIN2 are internally tied together.)
2 EN1 Enable Input to Regulator 1: Enables regulator 1 output. Active high input.
High = on, low = off. Do not leave floating.
3 EN2 Enable Input to Regulator 2: Enables regulator 2 output. Active high input.
High = on, low = off. Do not leave floating.
4 CBYP Reference Bypass: Connect external 0.01µF to GND to reduce output noise.
May be left open.
5 SET Delay Set Input: Connect external capacitor to GND to set the internal delay
for the POR output. When left open, there is no delay. This pin cannot be
grounded.
6 GND Ground: Connect externally to Exposed Pad.
7 NC No Connection.
8 POR Power-On Reset Output: Open-drain output. Active low indicates an output
undervoltage condition on regulator 2.
9 VOUT2 Output of Regulator 2: 300mA output current.
10 VOUT1 Output of Regulator 1: 150mA output current.
EP GND Ground: Internally connected to the Exposed Pad. Connect externally to pin
6 of the IC.
1VIN
EN1
EN2
BYP
SET
10 VOUT1
VOUT2
POR
NC
GND
9
8
7
6
2
3
4
5
10-Pin 3mm × 3mm MLF™ (ML)
(Top View)
Pin Configuration
MIC2212 Micrel, Inc.
M9999-022106 4 February 2006
Electrical Characteristics(4)
VIN = VOUT +1.0V for higher output of the regulator pair; COUT = 1.0µF, IOUT = 100µA; TJ = 25°C, bold values indicate
–40°C ≤ TJ ≤ +125°C; unless noted.
Parameter Conditions Min Typ Max Units
Output Voltage Accuracy Variation from nominal VOUT –1.0 +1.0 %
–2.0 +2.0 %
Output Voltage Temp. 40 ppm/C
Coefficient
Line Regulation(5) VIN = VOUT +1V to 5.5V –0.3 0.02 0.3 %/V
–0.6 0.6
Load Regulation IOUT = 100µA to 150mA (Regulator 1 and 2) 0.2 1.0 %
IOUT = 100µA to 300mA (Regulator 2) 1.5 %
Dropout Voltage(6) IOUT = 150mA (Regulator 1 and 2) 120 190 mV
250 mV
IOUT = 300mA (Regulator 2) 240 340 mV
420
Ground Pin Current IOUT1 = IOUT2 = 0µA 48 65 µA
80 µA
IOUT1 = 150mA and IOUT2 = 300mA 60 µA
Ground Pin Current in VEN ≤ 0.4V 2.0 µA
Shutdown
Ripple Rejection f = 1kHz; COUT = 1.0µF ceramic; CBYP = 10nF 60 dB
f = 20kHz; COUT = 1.0µF ceramic; CBYP = 10nF 40 dB
Current Limit VOUT = 0V (Regulator 1) 150 280 460 mA
VOUT = 0V (Regulator 2) 300 450 700 mA
Output Voltage Noise COUT =1µF, CBYP = 0.01µF, 10Hz to 100kHz 30 µVrms
Enable Input
Enable Input Voltage Logic Low (Regulator Shutdown) 0.6 V
Logic High (Regulator Enabled) 1.8 V
Enable Input Current VIL < 0.6V (Regulator Shutdown) –1 0.01 +1 µA
VIH > 1.8V (Regulator Enabled) –1 0.01 +1 µA
POR Output
VTH Low Threshold, % of nominal VOUT2 (Flag ON) 90 %
High Threshold, % of nominal VOUT2 (Flag OFF) 96 %
VOL POR Output Logic Low Voltage; IL = 250µA 0.02 0.1 V
IPOR Flag Leakage Current, Flag OFF –1 0.01 +1 µA
Absolute Maximum Rating(1)
Supply Input Voltage (VIN) ......................................0V to 7V
Enable Input Voltage (VEN) ....................................0V to 7V
Power Dissipation (PD) ................ Internally Limited, Note 3
Junction Temperature ............................... –40°C to +125°C
Storage Temperature (TS) .......................... –65°C to 150°C
Lead Temperature (soldering, 5 sec.) ........................ 260°C
Operating Ratings(2)
Supply Input Voltage (VIN) ..............................2.25V to 5.5V
Enable Input Voltage (VEN) ...................................0V to Vin
Junction Temperature (TJ) ........................ –40°C to +125°C
Package Thermal Resistance
MLF™-10 (θJA) .................................................... 60°C/W
February 2006 5 M9999-022106
MIC2212 Micrel, Inc.
Parameter Conditions Min Typ Max Units
SET Input
SET Pin Current Source VSET = 0V 0.75 1.25 1.75 µA
SET Pin Threshold Voltage POR = High 1.25 V
Notes
1. Exceeding maximum rating may damage the device.
2. The device is not guaranteed to work outside its operating rating.
3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) – TA) / θJA. Exceeding the maximum allowable
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Specification for packaged product only.
5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differen-
tial. For outputs below 2.25V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.25V. Minimum input operat-
ing voltage is 2.25V.
MIC2212 Micrel, Inc.
M9999-022106 6 February 2006
Typical Characteristics
0
0.5
1
1.5
2
2.5
3
012345
)V(TUPTUO
SUPPLY VOLTAGE (V)
Dropout Characteristics
Output 1
150mA
100µA
0
0.5
1
1.5
2
2.5
3
012345
)V(TUPTUO
SUPPLY VOLTAGE (V)
Dropout Characteristics
Output 2
300mA
100µA
0
10
20
30
40
50
60
0 1 2 3 4 5 6
(
T
N
ERR
U
CD
N
UO
R
Gµ)
A
SUPPLY VOLTAGE (V)
Ground Current
vs. Suppl
y
Volta
g
e
Output 1 and 2
with 100µA load
0
10
20
30
40
50
60
0 20 40 60 80 100 120 140
(T
N
ERRU
C
DNU
O
R
Gµ)A
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output 1 Current
0
10
20
30
40
50
60
0 50 100 150 200 250 300
(
TN
ERRUCDNU
O
R
Gµ)
A
OUTPUT 2 LOAD CURRENT (mA)
Ground Current
vs. Output 2 Current
10E-9
100E-9
1E-6
10E-6
)zHtoor/V(YTISNEDESIONLARTCEPS
FREQUENCY (Hz)
Spectral Noise
Densit
y
Output 1
C
OUT
= 1µF
C
IN
= 1µF
C
BYP
= 0.01µF
100
µ
A Load
10 100 1k 10k 100k 1M
10 100 1k 10k 100k 1M
10E-9
100E-9
1E-6
10E-6
)z
Htoor
/
V(Y
T
I
S
NE
DE
S
I
ON
L
AR
TC
E
P
S
FREQUENCY (Hz)
Spectral Noise
Density Output 2
100µA Load
C
OUT
= 1µF
C
IN
= 1µF
C
BYP
= 0.01µF
0
20
40
60
80
0.01 0.1 1 10 100 1000
)Bd(
RR
S
P
FREQUENCY (kHz)
PSRR Output 2
C
BYP
= 10nF
C
BYP
= 100nF
C
BYP
= 1nF
V
IN
= V
OUT
+ 1
I
OUT
= 300mA
C
OUT
= 1µF
0
20
40
60
80
0.01 0.1 1 10 100 1000
)Bd(RRSP
FREQUENCY (kHz)
PSRR Output 1
C
BYP
= 10nF
C
BYP
= 100nF
C
BYP
= 1nF
V
IN
= V
OUT
+ 1
I
OUT
= 150mA
C
OUT
= 1µF
0
50
100
150
-40 -20 0 20 40 60 80 100120140
)Vm
(E
GATLO
V
TUOPORD
TEMPERATURE (°C)
Dropout Voltage
Output 1
150mA load
0
50
100
150
200
250
300
350
-40 -20 0 20 40 60 80 100120140
)
Vm(
E
G
AT
L
O
V
T
U
O
P
ORD
TEMPERATURE (°C)
Dropout Voltage
Output 2
300mA load
0
10
20
30
40
50
60
04-
02-
0
0
2
0
4
0
6
0
8
0
01
0
21
0
41
0
61
(
TN
E
RRUC
NI
PDNU
OR
Gµ)A
TEMPERATURE (°C)
Ground Pin Current
Load on both outputs
0µA100
µ
A
1mA
February 2006 7 M9999-022106
MIC2212 Micrel, Inc.
Typical Characteristics (cont.)
0
5
10
15
20
25
30
35
0 50 100 150
(TN
E
RRUC
D
NUORG µ)A
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output Current
LDO1 Only
LDO2 Disabled (V
EN2
= LOW)
LDO1
0
5
10
15
20
25
30
35
0 50 100 150 200 250 300
(TNERRUCDNUO
R
Gµ)A
OUTPUT 2 LOAD CURRENT (mA)
Ground Current
vs. Output Current
LDO2 Only
LDO1 Disabled (V
EN1
= LOW)
LDO2
0
10
20
30
40
50
60
0 50 100 150
(TN
ERR
UC
DNU
ORG µ)A
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output Current
Both Enabled
0
10
20
30
40
50
60
0 50 100 150 200 250 300
(T
N
E
R
RUCD
NU
OR
Gµ)
A
OUTPUT 2 LOAD CURRENT (mA)
Ground Current
vs. Output Current
Both LDOs Active
LDO1 = 150mA
Output Current LDO2
Varied from 0 to Full Load
Both Enabled
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
2.25 2.75 3.25 3.75 4.25 4.75 5.25
)V(DLOHSERHTELBANE
SUPPLY VOLTAGE (V)
Enable Voltage Threshold
vs. Supply Voltage
(EM
I
Tµ)s
POR SETTING CAP (pF)
POR Delay
CIN = 1µF
COUT = 1µF
ILOAD = 100µA
1 10 100 1k 10k 100k 1M
1
10
100
1k
10k
100k
10M
1M
2.65
2.70
2.75
2.80
2.85
2.90
2.95
-40 -20 0 20 40 60 80 100120140
)
V
(E
G
A
T
LOV
T
U
P
T
U
O
TEMPERATURE (°C)
Output Voltage 2
vs. Temperature
100µA load
2.85
2.90
2.95
3.00
3.05
3.10
3.15
-40 -20 0 20 40 60 80 100120140
)V
(E
G
A
TLOV
T
UPT
U
O
TEMPERATURE (°C)
Output Voltage 1
vs. Temperature
100µA load
2.580
2.585
2.590
2.595
2.600
2.605
2.610
0 25 50 75 100 125 150
)
V(EG
A
TL
O
V
T
U
P
T
U
O
OUTPUT 1 LOAD CURRENT (mA)
Output Voltage
vs. Load Current
2.820
2.825
2.830
2.835
2.840
2.845
2.850
2.855
2.860
2.865
2.870
0 50 100 150 200 250 300
)V(EGATLOVTU
P
TUO
OUTPUT 2 LOAD CURRENT (mA)
Output Voltage
vs. Load Current
MIC2212 Micrel, Inc.
M9999-022106 8 February 2006
Enable Characteristics
Time (100µs/div)
VEN
(2V/div)
VOUT1
(2V/div)
VOUT2
(1V/div)
CIN = 1µF
COUT = 1µF Ceramic
CBYP = 0.01µF
VIN = 3.8V
Power-On Reset Characteristics
Time (2ms/div)
VEN
(2V/div)
POR
(1V/div)
VOUT1
(2V/div)
VOUT2
(1V/div)
CIN = 1µF
COUT = 1µF Ceramic
CSET = 0.01µF
CBYP = 0.01µF
VIN = 5V
Load Transient Response (LDO 2)
Time (4µs/div)
IOUT2
(200mA/div)
VOUT1
(100mV/div)
VOUT2
(100mV/div)
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT +1V
300mA
100µA
Load Transient Response (LDO 1)
Time (4µs/div)
IOUT1
(100mA/div)
VOUT1
(50mV/div)
VOUT2
(50mV/div)
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT +1V
150mA
100µA
Functional Characteristics
February 2006 9 M9999-022106
MIC2212 Micrel, Inc.
Functional Diagram
OUT1
OUT2
POR
GND
CBYP
SET
EN1
EN2
VIN
LDO1
LDO2
Reference
POR & Del ay
MIC2212 Fixed Voltage Block Diagram
Functional Description
The MIC2212 is a high performance, low quiescent current
power management IC consisting of two µCap low dropout
regulators, a power-on reset (POR) circuit and an open-drain
driver. The first regulator is capable of sourcing 150mA at
output voltages from 1.25V to 5V. The second regulator is
capable of sourcing 300mA of current at output voltages from
1.25V to 5V. The second regulator has a POR circuit that
monitors its output voltage and indicates when the output
voltage is within 5% of nominal. The POR offers a delay
time that is externally programmable with a single capacitor
to ground.
Enable 1 and 2
The enable inputs allow for logic control of both output
voltages with individual enable inputs. The enable input is
active high, requiring 1.8V for guaranteed operation. The
enable input is CMOS logic and cannot by left floating.
Power-On Reset (POR)
The power-on reset output is an open-drain N-Channel
device, requiring a pull-up resistor to either the input voltage
or output voltage for proper voltage levels. The POR output
has a delay time that is programmable with a capacitor from
the SET pin to ground. The delay time can be programmed
to be as long as 1 second.
The SET pin is a current source output that charges a
capacitor that sets the delay time for the power-on reset
output. The current source is a 1µA current source that charges
a capacitor up from 0V. When the capacitor reaches 1.25V,
the output of the POR is allowed to go high.
Input Capacitor
Good bypassing is recommended from input to ground to
help improve AC performance. A 1µF capacitor or greater
located close to the IC is recommended.
Bypass Capacitor
The internal reference voltage of the MIC2212 can be
bypassed with a capacitor to ground to reduce output noise
and increase power supply rejection (PSRR). A quick-
start feature allows for quick turn-on of the output voltage
regardless of the size of the capacitor. The recommended
nominal bypass capacitor is 0.01µF, but it can be increased
without limit.
Output Capacitor
Each regulator output requires a 1µF ceramic output capaci-
tor for stability. The output capacitor value can be increased
to improve transient response, but performance has been
optimized for a 1µF ceramic type output capacitor.
X7R/X5R dielectric-type ceramic capacitors are recom-
mended because of their temperature performance. X7R-type
capacitors change capacitance by 15% over their operating
temperature range and are the most stable type of ceramic
capacitors. Z5U and Y5V dielectric capacitors change value
by as much as 50% and 60% respectively over their operat-
ing temperature ranges. To use a ceramic chip capacitor with
Y5V dielectric, the value must be much higher than a X7R
ceramic capacitor to ensure the same minimum capacitance
over the equivalent operating temperature range.
MIC2212 Micrel, Inc.
M9999-022106 10 February 2006
Package Information
10-Pin 3mm x 3mm MLF (ML)
MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's
use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2004 Micrel Incorporated