AS1363 D a ta s h e e t 5 0 0 m A , L o w - D r o p o u t L i ne a r Vo l ta g e R e g u l a t o r 1 General Description 2 Key Features The AS1363 is a low-dropout linear regulator that operates from a +2.0V to +5.5V supply and delivers a guaranteed 500mA load current with low 150mV dropout. ! Guaranteed Output Current: 500mA ! Low Dropout: 150mV @ 500mA The device is available in two versions (see Table 1). One version has a high-accuracy output with a preset voltage (1.2, 1.5, 1.8, 3.0, 3.3, or 4.5V). This voltage is internally trimmed and also offers a Bypass pin. With a capacitor connected to this Bypass pin, the PSRR and the Noise performance is improved. ! 2.0V to 5.5V Input Voltage ! Fixed Output Voltage: 1.2V to 5.0V ! User-Adjustable Output Voltage: 1.2V to 5.3V ! Power OK Output ! Low Quiescent Current: 40µA ! Low Shutdown Current: 30nA ! Thermal Overload Protection ! Output Current Limit ! 6-pin SOT23 Package At the other version the output voltage is user-adjustable (1.2V to 5.3V) and offers an SET pin for setting the output voltage. Table 1. Standard Products Model Output Type BYP SET AS1363-AD Adjustable No Yes AS1363-_ _ Fixed Yes No A low supply current (65µA typ.) at maximum load is making the device ideal for portable battery-operated equipment. Other features are included such as an active-low opendrain reset output that indicates when the output is out of regulation, a low-current (30nA typ.) shutdown mode, an integrated short-circuit and a thermal shutdown protection. 3 Applications The device is ideal for laptops, PDAs, portable audio devices, mobile phones, cordless phones, and any other battery-operated portable device. The AS1363 is available in a 6-pin SOT23 package. Figure 1. Typical Application Circuit 6 1 VIN 2.0V to 5.5V VOUT 1.2V to 5.3V OUT IN COUT 2.2µF CIN 1µF R1 On Off 3 AS1363-AD 5 SET EN R2 2 To Controller 4 POK GND RPOK 100kΩ VOUT Logic Supply Voltage www.austriamicrosystems.com Revision 1.03 1 - 14 AS1363 Datasheet - P i n o u t 4 Pinout Pin Assignments Figure 2. Pin Assignments (Top View) IN 1 POK 2 EN 3 6 OUT AS1363 5 SET/BYP 4 GND Pin Descriptions Table 2. Pin Descriptions Pin Number Pin Name 1 IN 2 POK 3 EN 4 GND SET 5 BYP 6 OUT www.austriamicrosystems.com Description +2.0V to +5.5V Supply Voltage. Bypass this pin with a 1µF capacitor to GND (see Capacitor Selection and Regulator Stability on page 11). Open-Drain POK Output. POK remains low while VOUT is below the POK threshold. Connect a 100kΩ pull-up resistor from this pin to OUT to obtain an output voltage (see Figure 1 on page 1). Active-High Enable Input. A logic low reduces supply current below 30nA. In shutdown mode, the POK output is low, and OUT is high impedance. Connect this pin to IN for normal operation. Ground Voltage-Setting Input. Connect to GND for preset output or Connect to a resistive voltage-divider between OUT and GND to set the output voltage between 1.2V and 5.3V (see Figure 1 on page 1). Bypass Pin. Connect a 10nF capacitor from this pin to VOUT to improve PSRR and noise performance (see Figure 16 on page 9). Output. Sources up to 500mA. Bypass this pin with a 2.2µF low-ESR capacitor to GND (see Figure 1 on page 1). Note: For output voltages below 2V a 4.7µF capacitor should be used. Revision 1.03 2 - 14 AS1363 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 3 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 Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3. Absolute Maximum Ratings Parameter Min Max Units IN, POK, EN, SET/BYP to GND -0.3 +6 V OUT to GND -0.3 VIN +0.3 V Output Short-Circuit Duration 1 min Continuous Power Dissipation 800 mW Operating Temperature Range -40 +85 ºC Storage Temperature Range -65 +150 ºC +150 ºC Junction Temperature Package Body Temperature www.austriamicrosystems.com +260 ºC Revision 1.03 Comments TAMB = +70ºC; derate 10mW/ºC above +70ºC The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020D “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 - 14 AS1363 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(NOM) + 500mV or VIN = +2.0V (whichever is greater), CIN = 1µF, COUT = 2.2µF, EN = IN, TAMB = -40 to +85ºC (unless otherwise specified). Typical values are at TAMB = +25ºC. Table 4. Electrical Characteristics Symbol Parameter VIN Input Voltage VPOR Power On reset Condition Min Typ 2.0 Output Voltage Accuracy (Preset Mode) V +0.75 IOUT = 100mA -1.5 +1.5 -2 +2 1.2 5.3 V 1.23 V VSET/BYP SET/BYP Voltage Threshold (Adjustable Mode) IOUT Guaranteed Output Current (RMS) ILIMIT Short-Circuit Current Limit VOUT = 0V In-Regulation Current Limit VOUT > 96% of nominal value VIN = 2.5V, IOUT = 100mA, VOUT set to 2.0V 1.17 1.20 500 SET/BYP Threshold Quiescent Current 1.96 -0.75 Adjustable Output Voltage Range IQ V IOUT = 100mA, TAMB = +25ºC, VOUT SET/BYP Input Bias Current 5.5 1.78 IOUT = 1 to 500mA, VIN > (VOUT + 0.5V) ISET Unit Falling, 100mV hysteresis 1 1.87 Max 0.55 VSET/BYP = 1.2V mA 0.8 1.2 0.8 50 % 100 -100 A A 150 mV +100 nA IOUT = 100µA 40 150 IOUT = 500mA 65 200 150 320 mV %/V µA VIN VOUT Dropout Voltage ΔVLNR Line Regulation VIN from (VOUT + 100mV) to 5.5V, ILOAD = 5mA -0.125 +0.125 ΔVLDR Load Regulation IOUT = 1 to 500mA -0.001 +0.001 %/mA PSRR 2 Ripple Rejection Output Voltage Noise IOUT = 500mA VOUT = 2.5V f = 1kHz, IOUT = 10mA, adjustable Output 65 f = 10kHz, IOUT = 10mA, adjustable Output 70 f = 100kHz, IOUT = 10mA, adjustable Output 60 10Hz to 100kHz, IOUT = 10mA, adjustable Output 80 100Hz to 100kHz, IOUT = 10mA, adjustable Output 65 EN = GND, VIN = 5.5V, TAMB = 25°C 0.03 dB µVRMS Shutdown IOFF Shutdown Supply Current VIH VIL IEN EN Input Threshold EN Input Bias Current www.austriamicrosystems.com EN = GND, VIN = 5.5V 2.0V < VIN < 5.5V 15 1.6 µA V 2.0V < VIN < 5.5V 0.6 EN = IN or GND, TAMB = +25ºC 1 TAMB = +85ºC 5 Revision 1.03 0.5 V nA 4 - 14 AS1363 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 Table 4. Electrical Characteristics (Continued) Symbol Parameter Condition Min Typ Max Unit POK Output Low Voltage POK sinking 1mA 0.05 0.25 V Operating Voltage Range for Valid POK Signal POK sinking 100µA 5.5 V POK Output High leakage Current POK = 5.5V, TAMB = +25ºC 1 TAMB = +85ºC 5 POK Threshold Rising edge (referenced to VOUT(NOM)) POK Output VOL 1.1 90 94 nA 98 % Thermal Protection TSHDNN Thermal Shutdown Temperature ΔTSHDNN Thermal Shutdown Hysteresis 170 ºC 20 ºC 1. Guaranteed by production test of load regulation and line 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 2.0V, this specification is only valid when VOUT(NOM) > 2.0V. www.austriamicrosystems.com Revision 1.03 5 - 14 AS1363 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 = VOUT(NOM) + 0.5V, CIN = 1µF, COUT = 2.2µF, TAMB = 25°C (unless otherwise specified). Figure 3. VDROP vs. IOUT; Figure 4. VOUT vs. IOUT; VOUT(NOM) = 2.5V 160 2.503 120 Output Voltage (V) Dropout Voltage (mV) 140 100 80 60 40 2.502 2.501 2.5 20 0 2.499 0 100 200 300 400 500 0 100 Load Current (mA) Figure 5. VOUT vs. Temperature; VOUT(NOM) = 2.5V 300 400 500 Figure 6. VOUT vs. VIN; VOUT(NOM) = 2.5V 2.505 3 2.504 Iout = 0mA 2.5 2.503 Output Voltage (V) Output Voltage (V) 200 Output Current (mA) 2.502 2.501 2.5 2.499 Iout = 500mA 2 1.5 1 2.498 0.5 2.497 2.496 -45 -30 -15 0 0 15 30 45 60 75 90 0 0.5 Temperature (°C) Figure 7. Quiescent Current vs. VIN; no load 1.5 2 2.5 3 Figure 8. Quiescent Current vs. IOUT; VIN = 3.0V; 100 120 100 Quiescent Current (µA) Quiescent Current (µA) 1 Input Voltage (V) 80 60 40 20 0 80 60 40 20 0 0 1 2 3 4 5 6 Input Voltage (V) www.austriamicrosystems.com 0 100 200 300 400 500 Output Current (mA) Revision 1.03 6 - 14 AS1363 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 Figure 9. Quiescent Current vs. Temperature; VIN = 3.0V Figure 10. PSRR vs. Frequency; IOUT = 10mA, CIN = 68nF, -50 80 -60 PSRR (dB) Quiescent Current (µA) 100 60 40 -70 -80 20 no l oad Iout = 100mA -90 45 60 75 10 90 Temperature (°C) VOUT IOUT 200mV/Div 20mV/DIV VIN VOUT 100000 5µs/Div Figure 14. Startup; VIN = 3.0V, IOUT = 100mA 1V/DIV EN VOUT 1V/Div Figure 13. Startup; VIN = 3.0V, IOUT = 100mA EN 10000 Figure 12. Load Transient Response; VIN = 3.0V, IOUT = 50mA to 250mA 1ms/Div VOUT 1000 Frequency (Hz) Figure 11. Line Transient Response; VIN = 3.0V to 3.5V, IOUT = 100mA 1ms/Div www.austriamicrosystems.com 100 50mV/Div 30 100mA/DIV 15 1V/Div 0 1V/DIV 0 -45 -30 -15 20µs/Div Revision 1.03 7 - 14 AS1363 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1363 is a low-dropout, low-quiescent-current linear regulator specifically designed for battery-powered devices. The regulator supplies loads of up to 500mA and can deliver a factory-preset output voltage or user-adjustable output voltage. The device features a 1.2V reference, error amplifier, P-channel pass transistor, and internal feedback voltage-divider (see Figure 15). Additional blocks include an output current limiter, thermal sensor, and shutdown logic. Figure 15. Block Diagram VIN 2.0V to 5.5V 1 IN CIN 1µF Thermal Sensor MOSFET Driver w/ILIM VOUT 1.2V to 5.3V 6 3 On Off EN Shutdown Logic OUT + Error Amplifier VOUT Logic Supply Voltage 1.25V Reference COUT 2.2µF 5kΩ – R1 RPOK 100kΩ To Controller 2 5 POK + – 93%VREF SET + – + – 100mV R2 + – 4 GND AS1363-AD The 1.2V reference is connected to the error amplifier, which 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 lower, allowing 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 up, allowing less current to pass to the output. The output voltage is delivered back through either an internal resistive divider connected to OUT or an external resistor network connected to SET (see Figure 15). The comparator examines VSET/BYP and selects the feedback path. If VSET/BYP is less than 50mV, the internal feedback path is used and the output is regulated to the factory-preset voltage (see Ordering Information on page 13). Internal P-Channel Pass Transistor The AS1363 features a P-channel MOSFET pass transistor and consumes only a maximum of 200µA of quiescent current under heavy loads as well as in dropout. Shutdown If pin EN is connected to GND the AS1363 is disabled. In shutdown mode all internal circuits are turned off, reducing supply current to 30nA (typ.). For normal operation pin EN must be connected to IN. During shutdown, POK is low. www.austriamicrosystems.com Revision 1.03 8 - 14 AS1363 Datasheet - D e t a i l e d D e s c r i p t i o n Output Voltage Selection The AS1363 is available in two versions (see Ordering Information on page 13). One version can only operate at one fixed output voltage and the other version can operate with a preset output voltage or with user-adjustable output voltages (1.2V to 5.3V). ! For the fixed output voltage version connect a capacitor CBYP from pin BYP to VOUT to improve PSRR and Noise performance (see Figure 16). ! To use the factory preset output voltage of the user-adjustable output voltage version, connect pin SET to GND (see Figure 17). ! For configurations using an output voltage other than the factory preset, a voltage-divider from OUT to SET to GND is required, as shown in (see Figure 1 on page 1). A value for R2 in the 25kΩ to 100kΩ range should be sufficient. Calculate the value for R1 as: V OUT R 1 = R 2 × ⎛ --------------------- – 1⎞ ⎝ V SETBYP ⎠ (EQ 1) Where: VOUT is in a range from 1.2V to 5.3V. VSET/BYP = 1.2V. Figure 16. Fixed Output Voltage 1 VIN 2.0V to 5.5V 6 IN VOUT 1.2V to 5.0V OUT CIN 1µF COUT 2.2µF RPOK 100kΩ AS1363 3 On Off EN 2 To Controller CBYP 10nF POK 5 4 BYP GND Figure 17. Adjustable Output using preset Output Voltage 1 VIN 2.5V to 5.5V 6 IN CIN 1µF On Off COUT 2.2µF RPOK 100kΩ 3 EN 4 GND www.austriamicrosystems.com VOUT 2.5V OUT AS1363-AD 2 To Controller POK 5 SET Revision 1.03 9 - 14 AS1363 Datasheet - D e t a i l e d D e s c r i p t i o n Power-OK The AS1363 features a power-ok indicator that asserts when the output voltage falls out of regulation. The open-drain POK output goes low when output voltage at OUT falls 6% below its nominal value. A 100kΩ pull-up resistor from POK to a (typically OUT) provides a logic control signal. POK can be used as a power-on-reset (POR) signal to a microcontroller or can drive an external LED to indicate a power failure condition. Note: POK is low during shutdown. Current Limit The AS1363 features current limiting circuitry that monitors the pass transistor, limiting short-circuit output current to 0.8A (typ). The circuitry of the AS1363 allows that the output can be shorted to ground for an indefinite period of time without damaging the device. Thermal Overload Protection Integrated thermal overload protection limits the total power dissipation in the AS1363. When the junction temperature (TJ) exceeds +170ºC typically, the pass transistor is turned off. Normal operation is continued when TJ drops approximately 20ºC. Note: Regardless of the hysteresis, continuous short-circuit condition will result in a pulsed output. Operating Region and Power Dissipation Maximum power dissipation depends on the thermal resistance of the IC package and circuit board, the temperature difference between the die junction and ambient air, and the rate of air flow. The power dissipated in the device is given as: PD = I OUT × ( V IN – V OUT ) (EQ 2) The AS1363 can deliver up to 0.5A RMS and operates with input voltages up to +5.5V, but not at the same time. High output currents can only be sustained when input/output differential voltages are low. The maximum allowed power dissipation is 800mW at TAMB = +70ºC or: T J ( max ) – T AMB PDMAX = -------------------------------------θ JC + θ CA (EQ 3) Where: TJ(MAX) - TAMB is the temperature difference between the device die junction and the surrounding air. θJC is the thermal resistance of the junction to the case. θCA is the thermal resistance from the case through the PCB, copper traces, and other materials to the surrounding air. Note: For best heat transfer, the copper area should be equally shared between the IN, OUT, and GND pins. www.austriamicrosystems.com Revision 1.03 10 - 14 AS1363 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 Input and output capacitors are required for stable operation of the AS1363 over the full temperature range and with load currents up to 500mA. Connect CIN and COUT as close to the AS1363 as possible to minimize the impact of PC board trace inductance. For CIN, connect a 1µF capacitor between IN and ground. CIN lowers the source impedance of the input supply. Reduce noise and improve load-transient response, stability, and power supply rejection by using larger output capacitors, such as 10µF. For COUT connect a 2.2µF low-ESR capacitor between OUT and ground. The output capacitor’s ESR affects stability and output noise. Use output capacitors with an ESR of 0.1Ω or less to ensure stability and optimum transient response. Surface-mount ceramic capacitors have very-low ESR and are commonly available in values up to 10µF. For output voltages less than 2V, use a 4.7µF low-ESR output capacitor for COUT. Noise, Power Supply Rejection Ratio, and Transient Response The AS1363 is designed to operate with low dropout voltages and low quiescent currents in battery-powered systems while still maintaining good noise response, transient response, and AC rejection. See Typical Operating Characteristics on page 6 for a plot of power-supply rejection ratio (PSRR) versus frequency. When operating from noisy sources, improved supply-noise rejection and transient response can be achieved by increasing the values of the input and output bypass capacitors and through passive filtering techniques. Dropout Voltage Because the AS1363 uses a P-channel MOSFET pass transistor, its dropout voltage is a function of drain-to-source on-resistance (RDS(ON)) multiplied by the load current: V DROPOUT = V IN – V OUT = R DS ( ON ) × I OUT (EQ 4) Note: The AS1363 ground current remains below 200µA in dropout. www.austriamicrosystems.com Revision 1.03 11 - 14 AS1363 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 an 6-pin SOT23 package. Figure 18. 6-pin SOT23 Package Notes: 1. Dimensions are in millimeters (mm). 2. Foot length measured at intercept point between datum A and lead surface. 3. Package outline exclusive of mold flash and metal burr. 4. Package outline inclusive of solder plating. 5. Complies with EIAJ SC74A. www.austriamicrosystems.com Revision 1.03 Symbol A A1 A2 b C D E E1 L E e1 Min 0.90 0.00 0.90 0.30 0.09 2.80 2.60 1.50 0.30 α 0º Nom Max 1.45 0.15 1.30 0.50 0.20 3.05 3.00 1.75 0.55 0.95Ref 1.90Ref 8º 12 - 14 AS1363 Datasheet - O r d e r i n g I n f o r m a t i o n 11 Ordering Information The device is available as the standard products shown in Table 5. Table 5. Ordering Information Model Marking Output SET/BYP Delivery Form Package AS1363-BSTT-AD ASQ9 adjustable (preset to 2.5V) SET Tape and Reel 6-pin SOT23 AS1363-BSTT-12* ASRY 1.2V BYP Tape and Reel 6-pin SOT23 AS1363-BSTT-15* ASRA 1.5V BYP Tape and Reel 6-pin SOT23 AS1363-BSTT-18* ASRB 1.8V BYP Tape and Reel 6-pin SOT23 AS1363-BSTT-30* ASRC 3.0V BYP Tape and Reel 6-pin SOT23 AS1363-BSTT-33* ASRD 3.3V BYP Tape and Reel 6-pin SOT23 AS1363-BSTT-45* ASRE 4.5V BYP Tape and Reel 6-pin SOT23 All devices are RoHS compliant and free of halogene substances. *Future product. Non-standard devices are available between 1.4V and 4.6V in 50mV steps and between 4.6V and 5.0V in 100mV steps. For more information and inquiries contact http://www.austriamicrosystems.com/contact-us www.austriamicrosystems.com Revision 1.03 13 - 14 AS1363 Datasheet Copyrights Copyright © 1997-2009, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. 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. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact-us www.austriamicrosystems.com Revision 1.03 14 - 14