Datasheet AS1375 1 A Q u i e s c e n t C u r r e n t , 2 0 0 m A L D O 1 General Description 2 Key Features The AS1375 low-power, positive voltage regulator is designed to deliver up to 200mA, while consuming only 1A (typ.) of quiescent current. The device is available in fixed output voltages between 1.2V and 5.0V (programmable in 50mV steps). The input voltage ranges from 2V to 5.5V. Operation with large input to output differential voltages is limited by the maximum power dissipation available from package and environment. !"Input The very-low dropout voltage prolongs battery life and allows high current in small applications when operated with minimum input-to-output voltage differentials. The device features very stable output voltage, strict output voltage regulation tolerances (1%), and excellent lineand load-regulation. !"Integrated The device features integrated short-circuit and over current protection. Under-Voltage lockout prevents erratic operation when the input voltage is slowly decaying. Thermal Protection shuts down the device when die temperature reaches 160C. This is a useful protection when the device is under sustained short circuit conditions. !"6-pin !"Low Voltage: 2V to 5.5V Dropout Voltage: 120mV @ 200mA load !"Output Voltage Range: 1.2V to 5.0V (50mV steps) !"Max. Output Current: 200mA !"Very Low Quiescent Current: 1A !"Output !"Low Voltage Accuracy: 1% Shutdown Current: 10nA (typ.) Overtemperature/Overcurrent Protection !"Under-Voltage !"Enable Lockout Feature Input !"Minimal External Components Required !"Operating Temperature Range: -40C to +85C TDFN 2x2mm Package 3 Applications The device is perfectly suited for wireless handsets, smartphones, PDAs, MP3 players, and other batteryoperated handheld devices, where the regulators have to be always on. The AS1375 is available in an 6-pin TDFN 2x2mm package and is qualified for -40C to +85C operation. Figure 1. AS1375 - Typical Application Diagram Input 2V to 5.5V CIN 1F ON / OFF www.austriamicrosystems.com/LDOs/AS1375 Output 1.2V to 5V OUT IN AS1375 EN COUT 1F GND Revision 1.02 1 - 10 AS1375 Datasheet - P i n A s s i g n m e n t s 4 Pin Assignments Figure 2. Pin Assignments (Top View) IN 1 GND 2 EN 3 6 OUT AS1375 7 5 GND 4 GND Pin Descriptions Table 1. Pin Descriptions Pin Name IN Pin Number 1 EN 3 GND 2, 4, 5 OUT 6 Exposed Pad 7 www.austriamicrosystems.com/LDOs/AS1375 Description Input Supply Enable Input. A logic low disables the regulator. Connect to pin IN for normal operation. Ground Regulated Output Voltage. Current flowing out of this pin is equivalent DC load current. Ground. This pin also functions as a heat sink. Solder to a large pad or the circuit-board ground plane to maximize power dissipation. Revision 1.02 2 - 10 AS1375 Datasheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Section 6 Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter Min Input Voltage Output Short-Circuit Duration Max Units +7 V Indefinite Electrostatic Discharge V 2 Latch-Up 100 kV HBM MIL-Std. 883E 3015.7 methods mA @85C, JEDEC 78 Thermal Resistance !JA +140 C/W Junction Temperature +150 C Operating Temperature Range -40 +85 C Storage Temperature Range -65 +150 C Package Body Temperature www.austriamicrosystems.com/LDOs/AS1375 Notes +260 Revision 1.02 C Internally limited The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD020D "Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices". The lead finish for Pb-free leaded packages is matte tin (100% Sn). 3 - 10 AS1375 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics VIN = VOUT + 500mV or VIN = +2V (whichever is greater),CIN = COUT = 1F, EN = IN, TAMB = -40C to +85 C (unless otherwise specified). Typical values are at TAMB = +25C. Table 3. Electrical Characteristics Symbol Parameter VIN Input Voltage Condition Min IOUT = 10mA Output Voltage Accuracy Typ Max Unit 2 5.5 V -1 +1 % 1 -1.5 +1.5 % 1 -2 +2 % 5.0 V IOUT = 1 to 200mA, VOUT > 1.5V IOUT = 1 to 200mA, VOUT < 1.5V VOUT Output Voltage Range 1.2 IOUT Guaranteed Output Current (RMS) 200 ILIMIT Short-Circuit Current Limit VOUT = 0 In-Regulation Current Limit VOUT > 96% of nominal value 330 IOUT = 0 1.2 IOUT = 100A 1 IOUT = 200mA 1.7 IOUT = 200mA, VOUT " 2.8V 120 200 IOUT = 200mA, 2V < VOUT < 2.8V 170 350 IQ Ground-Pin Current 250 mA 330 VIN VOUT Dropout Voltage #VLNR Line Regulation VIN from (VOUT + 500mV) to 5.5V, ILOAD = 10mA #VLDR Load Regulation IOUT = 1mA to 200mA 0.003 Shutdown Supply Current EN = GND 10 2 -0.125 450 mA mA 2 A +0.125 mV %/V %/mA Shutdown IOFF VIH VIL IEN EN Input Threshold 2V < VIN < 5.5V 100 nA 1.2 V 2V < VIN < 5.5V 0.4 EN Input Bias Current EN = IN or GND 1 Startup Time from EN to 90% of VOUT(NOM) 750 Shutdown Time from EN to 10% of VOUT(NOM) 500 3 40 V nA s Thermal Protection TSHDNN Thermal Shutdown Temperature #TSHDNN Thermal Shutdown Hysteresis 160 C 20 C 1. Guaranteed by production test of load regulation. 2. Dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT measured for VIN = (VOUT(NOM) + 500mV). Since the minimum input voltage is 2V, this specification is only valid when VOUT(NOM) > 2V. 3. Guaranteed by design. Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. www.austriamicrosystems.com/LDOs/AS1375 Revision 1.02 4 - 10 AS1375 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s 7 Typical Operating Characteristics VIN = 3.5V, VOUT = 3.0V, TAMB = +25C (unless otherwise specified). Figure 4. Load Regulation 3.05 3.05 3.025 3.025 Output Voltage (V) Output Voltage (V) Figure 3. Line Regulation 3 Iout = 0.1mA 2.975 3 2.975 Iout = 10mA Iout 0 100mA Iout = 200mA 2.95 2.95 3.5 3.75 4 4.25 4.5 4.75 5 5.25 5.5 0 25 50 Input Voltage (V) 75 100 125 150 175 200 Output Current (mA) Figure 5. Ground Pin Current vs. Output Current Figure 6. Ground Pin Current vs. Input Voltage 2.5 2.5 2.25 Ground Pin Current (A) Ground Pin Current (A) Iout = 0.1mA 2 1.75 1.5 1.25 1 Iout = 100mA 2.25 Iout = 200mA 2 1.75 1.5 1.25 1 0 25 50 75 100 125 150 175 200 3.5 3.75 Output Current (mA) 4 4.25 4.5 4.75 5 5.25 5.5 Input Voltage (V) Figure 7. Output Voltage vs. Input Voltage - Dropout 3.06 Output Voltage (V) 3.04 3.02 3 2.98 2.96 2.94 Iload = 100mA 2.92 Iload = 200mA 2.9 2.9 3 3.1 3.2 3.3 3.4 3.5 Input Voltage (V) www.austriamicrosystems.com/LDOs/AS1375 Revision 1.02 5 - 10 AS1375 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1375 is an low-power and low-quiescent current linear-regulator specifically designed for space-limited applications. These device can supply loads up to 200mA. As shown in Figure 8, the AS1375 consist of an integrated voltage reference, error amplifier, P-channel MOSFET pass transistor. Additional blocks include a current limiter, thermal sensor, and enable logic. Internal Voltage Reference The bandgap reference is connected to the error amplifier's inverting input. The error amplifier compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled low. This allows more current to pass to the output and increases the output voltage. If the feedback voltage is too high, the pass transistor gate is pulled high, allowing less current to pass to the output. Figure 8. AS1375 - Block Diagram IN Overcurrent Protection EN Enable Control Logic Voltage and Current Reference Thermal Protection + AS1375 OUT GND Current Limit The AS1375 include a current limiting circuitry to monitor and control the P-channel MOSFET pass transistor's gate voltage, thus limiting the device output current to 300mA. Note: See Table 3 on page 4 for the min and max current limits. The output can be shorted to ground indefinitely without causing damage to the device. Thermal Protection Integrated thermal protection circuitry limits total power dissipation in the AS1375. When the junction temperature (TJ) exceeds +160C, the thermal sensor signals the shutdown logic, turning off the P-channel MOSFET pass transistor and allowing the device to cool down. The thermal sensor turns the pass transistor on again after the device's junction temperature drops by 20C, resulting in a pulsed output during continuous thermal-overload conditions. Note: Thermal protection is designed to protect the devices in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction temperature rating of +150C. www.austriamicrosystems.com/LDOs/AS1375 Revision 1.02 6 - 10 AS1375 Datasheet - A p p l i c a t i o n I n f o r m a t i o n 9 Application Information Capacitor Selection and Regulator Stability For normal operation, use a 1F capacitor at pin IN and a 1F capacitor at pin OUT. Larger input capacitor values and lower ESR provide better noise rejection and line-transient response. Reduce output noise and improve load-transient response, stability, and power-supply rejection by using large output capacitors. Note: Some ceramic dielectrics exhibit large capacitance and ESR variation with temperature. With dielectrics such as Z5U and Y5V, it may be necessary to use a 2.2F or larger output capacitor to ensure stability at temperatures below -10C. With X7R or X5R dielectrics, 1F is sufficient at all operating temperatures. Noise, PSRR, and Transient Response The AS1375 is designed to deliver low dropout and low quiescent currents in battery-powered systems. The powersupply rejection is 85dB at 1kHz and 50dB at 100kHz. When operating from sources other than batteries, improved supply-noise rejection and transient response can be achieved by increasing the values of the input and output capacitors, and through passive filtering techniques. Dropout Voltage The AS1375 minimum dropout voltage determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Since the AS1375 use a P-channel MOSFET pass transistor, the dropout voltage is a function of drain-to-source onresistance (RDS(ON)) multiplied by ILOAD. www.austriamicrosystems.com/LDOs/AS1375 Revision 1.02 7 - 10 AS1375 Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 10 Package Drawings and Markings The device is available in a 6-pin TDFN 2x2mm package. Figure 9. 6-pin TDFN 2x2mm Package Diagram D2 D Terminal Tip e A INDEX AREA (D/2 x E/2) B L D/2 PIN#1 ID aaa C E E/2 INDEX AREA D/2 x E/2 aaa C bbb b C A B EXPOSED PAD BOTTOM VIEW TOP VIEW A3 ccc C A B A1 SEATING PLANE 0.08 C SIDE VIEW Table 4. 4-bumps WL-CSP package Dimensions Symbol Min Typ A 0.51 0.55 A1 0.00 0.02 A3 0.15 REF 0.20 0.25 b 0.50 e aaa 0.15 bbb 0.10 ccc 0.10 Max 0.60 0.05 0.32 Symbol D BSC E BSC D2 E2 L k ND N Min 1.95 1.95 1.30 0.85 0.15 0.20 Typ 2.00 2.00 1.45 1.00 0.25 Max 2.05 2.05 1.55 1.10 0.35 3 6 Note: 1. All dimensions are in millimeters, angle is in degrees (). 2. N is the total number of terminals. 3. The location of the terminal #1 identifier and terminal numbering convention conforms to JEDEC publication 95 SPP-002. 4. ND and NE refer to the number of terminals on each D and E side respectively. 5. NJR refer to non jedec registered. 6. Dimension b applies to metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. If the terminal has the optional radius on the other end of the terminal, the dimension B should not be measured in that radius area. 7. Coplanarity applies to the terminals and all other bottom surface metallization. www.austriamicrosystems.com/LDOs/AS1375 Revision 1.02 8 - 10 AS1375 Datasheet - O r d e r i n g I n f o r m a t i o n 11 Ordering Information The devices are available as the standard products shown in Table 5. Table 5. Ordering Information Ordering Code Marking Output AS1375-BTDT-12 ABD 1.2V AS1375-BTDT-18 ABE 1.8V AS1375-BTDT-25 ABF 2.5V AS1375-BTDT-30 ABG 3.0V AS1375-BTDT-33 ABH 3.3V Description 1A Quiescent Current, 200mA LDO 1A Quiescent Current, 200mA LDO 1A Quiescent Current, 200mA LDO 1A Quiescent Current, 200mA LDO 1A Quiescent Current, 200mA LDO Delivery Form Package Tape and Reel 6-pin TDFN 2x2mm Tape and Reel 6-pin TDFN 2x2mm Tape and Reel 6-pin TDFN 2x2mm Tape and Reel 6-pin TDFN 2x2mm Tape and Reel 6-pin TDFN 2x2mm Non-standard devices from 1.2V to 5.0V are available in 50mV steps. For more information and inquiries contact$ http://www.austriamicrosystems.com/contact Note: All products are RoHS compliant.$ Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect$ $ Technical Support is found at http://www.austriamicrosystems.com/Technical-Support$ $ For further information and requests, please contact us mailto:sales@austriamicrosystems.com$ or find your local distributor at http://www.austriamicrosystems.com/distributor www.austriamicrosystems.com/LDOs/AS1375 Revision 1.02 9 - 10 AS1375 Datasheet Copyrights Copyright (c) 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. 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