Datasheet AS1360 1 . 5 µ A L o w - P o w e r, P o s i t i v e Vo l ta g e R e g u l a t o r 1 General Description 2 Key Features The AS1360 low-power, positive voltage regulator was designed to deliver up to 250mA while consuming only 1.5µA of quiescent current. The device is available in fixed output voltages of 1.8, 2.1, 2.5, 3.0, 3.3, and 5.0V. ! Low Quiescent Current: 1.5µA ! Input Voltage Range: Up to 20V The device features integrated short-circuit and overcurrent protection. ! Low Dropout Voltage - 250mV @ 100mA The wide input voltage range, low-dropout voltage, and high-accuracy output voltage makes the device perfectly suited for 2- and 3-cell battery-powered and portable applications. - 400mV @ 200mA The low dropout voltage (650mV) 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 (using only 1µF tantalum or aluminum-electrolytic capacitors), strict output voltage regulation tolerances (±0.5%), and excellent line-regulation. ! Fixed Output Voltages: 1.8, 2.1, 2.5, 3.0, 3.3, 5.0V ! High Output Current: 250mA (VOUT = 5.0V) ! High-Accuracy Output Voltage: ±1.5% ! Exceptional Line Regulation: 0.1%/V ! Low Temperature Drift: ±100ppm/ºC ! Integrated Short-Circuit and Overcurrent Protection ! 3-pin SOT23 Package The AS1360 is available in a 3-pin SOT23 package. 3 Applications The device is ideal for mobile phones, PDAs, digital cameras, smart battery packs, battery-powered alarms, solar-powered instruments, intelligent instruments, CO2 and smoke detectors, CPU power supplies, and any battery-powered application. Figure 1. AS1360 - Block Diagram 3 2 VIN VOUT Short-Circuit Protection + – Voltage Reference AS1360 GND www.austriamicrosystems.com/AS1360 1 Revision 1.04 1 - 12 AS1360 Datasheet - P i n o u t a n d P a c k a g i n g 4 Pinout and Packaging Pin Assignments Figure 2. Pin Assignments (Top View) GND 1 AS1360 VOUT 3 VIN 2 3-pin SOT23 Pin Descriptions Table 1. Pin Descriptions Pin Number 1 2 3 Pin Name Description GND Ground. This pin should be connected to the negative side of the output and the negative terminal of the input capacitor. No high-current flows out of this pin, only bias current (1.5µA, typ). Note: Voltage drops between this pin and the negative side of the load should be minimized. VOUT Regulated Output Voltage. This pin should be connected to the positive side of the load and the positive terminal of the output capacitor. Current flowing out of this pin is equivalent DC load current. Note: The positive side of the output capacitor should be mounted as close as is practical to this pin. VIN Unregulated Input Voltage. This pin should be connected to the positive terminal of the input capacitor. Note: The input capacitor should be mounted as close as is practical to this pin. www.austriamicrosystems.com/AS1360 Revision 1.04 2 - 12 AS1360 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 Max Units Input Voltage +30 V Continuous Output Current PD/ (VIN - VOUT) mA Peak Output Current 500 mA Output Voltage - 0.3V VIN + 0.3V or +7V V Minimum of the two values 230 ºC/W Typical FR4, 4-layer application Operating Temperature Range -40 +85 ºC Storage Temperature Range -40 +125 ºC Thermal Resistance ΘJA Electrostatic Discharge (ESD) Protection Level Package Body Temperature www.austriamicrosystems.com/AS1360 1 +260 Comments kV HBM - Norm: MIL 883 E methode 3015 ºC The reflow peak soldering temperature (body temperature) specified is in compliance with IPC/JEDEC J-STD-020D “Moisture/ Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. Revision 1.04 3 - 12 AS1360 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 TAMB = +25ºC (unless otherwise specified). Table 3. Electrical Characteristics Symbol VIN Parameter Condition Min Input Voltage 1 Typ Max Unit 20 V VOUTNOM VOUTNOM VOUTNOM IOUT = 40mA , - 1.5% ± 0.5% + 1.5% IOUT = 15mA if VOUT = 1.8V VOUT = 5.0V 250 (VIN = VOUTNOM + 1.0V) VOUT = 3.3V 150 Maximum Output 150 VOUT = 3.0V IOUT(MAX) Current 125 VOUT = 2.5V 115 VOUT = 2.1V 110 VOUT = 1.8V VOUT = 5.0V, 1mA ≤ IOUT ≤ 100mA -1.60 ±0.8 +1.60 VOUT = 3.3V, 1mA ≤ IOUT ≤ 80mA -2.72 ±1.3 +2.72 -3.00 ±1.5 +3.00 VOUT = 3.0V, 1mA ≤ IOUT ≤ 80mA 2 ΔVOUT/VOUT Load Regulation -3.60 ±1.8 +3.60 VOUT = 2.5V, 1mA ≤ IOUT ≤ 60mA VOUT = 2.1V, 1mA ≤ IOUT ≤ 40mA -2.60 ±1.6 +2.60 -1.60 ±0.8 +1.60 VOUT = 1.8V, 1mA ≤ IOUT ≤ 30mA ΔVOUT x 100/ I OUT = 40mA, Line Regulation 0.1 0.25 ΔVIN x VOUT (VOUTNOM +1.0) ≤ VIN ≤ 10.0V 400 630 IOUT = 200mA, VOUTNOM = 5.0V IOUT = 160mA, VOUTNOM = 3.3V 400 700 400 700 IOUT = 160mA, VOUTNOM = 3.0V VIN - VOUT Dropout Voltage IOUT = 120mA, VOUTNOM = 2.5V 400 700 200 500 IOUT = 60mA, VOUTNOM = 2.1V 180 300 IOUT = 20mA, VOUTNOM = 1.8V IQ Input Quiescent Current VIN = VOUTNOM +1.0V 1.5 3.0 Temperature Coefficient IOUT = 40mA, TCVOUT ±100 3 -40ºC ≤ TAMB ≤ +85ºC of VOUT 10% VOUTNOM to 90% VOUTNOM, tR Output Rise Time VIN = 0V to VOUTNOM + 1V, 150 RLOAD = 25Ω resistive VOUT Output Voltage V mA % %/V mV µA ppm/ ºC µs 1. VOUTNOM is the nominal device output voltage. 2. Measured at a constant junction temperature using low duty cycle pulse testing. 6 3. TCVOUT = (VOH - VOL) x 10 /(VOUTNOM x Temperature). Where: VOH is the highest voltage measured over the device temperature range. VOL is the lowest voltage over the device temperature range. 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/AS1360 Revision 1.04 4 - 12 AS1360 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 VOUT = 3.3V, ILOAD = 100µA, VIN = 4.3V, CIN 1µF (tantalum), COUT = 1µF (tantalum), TAMB = +25ºC (unless otherwise specified). Figure 4. Supply Current vs. Load Current 1.9 1.9 1.8 1.8 1.7 Supply Current (µA) . Supply Current (µA) . Figure 3. Supply Current vs. Input Voltage 85°C 1.6 1.5 25°C 1.4 0°C 1.3 85°C 1.7 1.6 1.5 25°C 1.4 0°C 1.3 -40°C 1.2 1.2 -40°C 1.1 1.1 4 5 6 7 8 9 10 0 25 50 Input Voltage (V) Figure 6. Output Voltage vs. Input Voltage 1.9 3.312 1.8 3.31 Output Voltage (V) . Supply Current (µA) . Figure 5. Supply Current vs. Temperature 1.7 1.6 1.5 1.4 1.3 1.2 25°C 0°C 3.308 3.306 3.304 3.302 -40°C 3.3 85°C 3.298 1.1 -40 -20 3.296 0 20 40 60 80 100 120 140 4 5 6 Temperature (°C) 7 8 9 10 Input Voltage (V) Figure 7. Output Voltage vs. Load Current Figure 8. Dropout Voltage vs. Load Current 700 3.31 85°C Dropout Voltage (mV) . 25°C 3.3 Output Voltage (V) . 75 100 125 150 175 200 Load Current (mA) 3.29 -40°C 3.28 0°C 3.27 3.26 3.25 600 500 400 25°C 0°C 300 200 -40°C 100 3.24 85°C 3.23 0 0 10 20 30 40 50 60 70 0 80 Load Current (mA) www.austriamicrosystems.com/AS1360 20 40 60 80 100 120 140 160 Load Current (mA) Revision 1.04 5 - 12 AS1360 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. Load Regulation vs. Temperature Figure 10. Line Regulation vs. Temperature 0.2 2.5 VIN = 10V Line Regulation (%/V) . Load Regulation (%) . 2.3 2.1 1.9 1.7 1.5 VIN = 6V 1.3 1.1 VIN = 4.3V 0.9 1mA / 10mA 0 40mA -0.2 -0.4 -0.6 -0.8 150mA -1 0.7 0.5 -40 -15 10 35 60 -1.2 -40 85 Temperature (°C) -15 10 35 60 85 Temperature (°C) Figure 11. Output Voltage vs. Input Voltage; Dropout Figure 12. Startup Rise Time 2 1.8 1.4 1 500mV/Div 1.2 VOUT Output Voltage (V) 1.6 0.8 0.6 0.4 Iload = 40mA 0.2 Iload = 100mA 0 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 50µs/Div Input Voltage (V) VIN 2V/Div VOUT 1V/Div Figure 13. Startup Delay 10ms/Div www.austriamicrosystems.com/AS1360 Note: All graphs where measured without additional heat sinks, with the SOT23 package mounted on a 4layer PCB. Adding additional heat sinks will improve performance in high temperature enviroment. Revision 1.04 6 - 12 AS1360 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1360 is a low-power, positive voltage regulator designed in such a way that the supply current is independent from the load current. The device regulates the output by comparing the output voltage to an internally generated reference voltage. The device is available in fixed output voltages of 1.8, 2.5, 3.0, 3.3, and 5.0V. Fixed output voltages are generated using the internal resistor divider network (see Figure 1 on page 1). Short Circuit/Overcurrent Protection The AS1360 monitors current flow through the p-channel MOSFET. In short-circuit or overcurrent conditions, the integrated short-circuit protection circuitry will limit output current. Note: Thermal Dissipation according to Absolute Maximum Ratings on page 3 must be considered. www.austriamicrosystems.com/AS1360 Revision 1.04 7 - 12 AS1360 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 Figure 14. AS1360 - Typical Application Diagram +9V Alkaline Battery 3 VIN CIN 1µF AS1360 VOUT * VOUT = 3.3V COUT 1µF GND * 2 * 1 Tantalum Capacitor Power Dissipation Power dissipation (PD) of the AS1360 is the sum of the power dissipated by the p-channel MOSFET and the quiescent current required to bias the internal voltage reference and the internal power amplifier, and is calculated as: PD (P-Channel MOSFET) = (VIN - VOUT)IOUT (EQ 1) Internal power dissipation as a result of the bias current for the internal voltage reference and the error amplifier is calculated as: PD (Bias) = VINIGND (EQ 2) Total AS1360 power dissipation is calculated as: PD(Total) = PD (P-Channel MOSFET) + PD (Bias) (EQ 3) The internal quiescent bias current (2µA, typ) is such that the PD(Bias) term of (EQ 3) can be disregarded and the maximum power dissipation can be estimated using VIN(MAX) and VOUT(MIN) to obtain a maximum voltage differential between VIN and VOUT, and multiplying the maximum voltage differential by the maximum output current: PD = (VIN(MAX)VOUT(MIN))IOUT(MAX) (EQ 4) Where: VIN = 3.3 to 4.1V VOUT = 3.0V ±2% IOUT = 1 to 100mA TAMB(MAX) = 55ºC PMAX = (4.1V - (3.0V x 0.98)) x 100mA = 116.0mW Junction Temperature The AS1360 junction temperature (TJ) can be determined by first calculating the thermal resistance from junction temperature-to-ambient temperature. Note: Thermal resistance is estimated to be the junction temperature-to-air temperature RΦJA, and is approximately 230°C/W or 335ºC/W (when mounted on 1 square inch of copper). RΦJA will vary depending on PCB layout, air-flow and application specific conditions. The AS1360 junction temperature is determined by calculating the rise in TJ above TAMB, and then adding the increase of TAMB: TJ = PD(MAX) x RΦJA + TAMB (EQ 5) From (EQ 5), the value of TJ can be calculated as: TJ = 116.0mW x 230ºC/W + 55ºC Therefore: TJ = 81.68ºC www.austriamicrosystems.com/AS1360 Revision 1.04 8 - 12 AS1360 Datasheet - A p p l i c a t i o n I n f o r m a t i o n External Component Selection Input Capacitor In applications where input impedance is approximately 10Ω, a 1µF capacitor is sufficient for CIN (see Figure 14 on page 8). In cases where the AS1360 is operated from a battery, or when there is significant distance between the input source to the AS1360, larger values for CIN may be required for output stability. Note: For values of COUT > 1µF, the value of CIN should be increased to prevent high source-impedance oscillations. Output Capacitor In most applications for the AS1360, a 1µF capacitor (ESR > 0.1Ω/< 5Ω, fRES > 1MHz) is sufficient for COUT (see Figure 14 on page 8). For improved power supply noise rejection and device transient response, larger values can be used for COUT. Note: For values of COUT > 1µF, the input impedance must not be so large that it causes high-input impedance oscillations. www.austriamicrosystems.com/AS1360 Revision 1.04 9 - 12 AS1360 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 3-pin SOT23 package. Figure 15. 3-pin SOT23 Package Notes: 1. Lead coplanarity should be 0 to 0.10mm (.004”) max. 2. Package surfacing: a. Top: matte (charmilles #18- 30). b. All sides: matte (charmilles #18- 30). c. Bottom: smooth or matte (charmilles #18- 30). 3. All dimensions excluding mold flashes and end flash from the package body shall not exceed 0.25mm (.010”) per side (D). 4. Details of pin #1 identifier are optional but must be located within the zone indicated. 5. Dimensions are in millimeters. www.austriamicrosystems.com/AS1360 Revision 1.04 Symbol A A1 B C D E e e1 H L A S Min 0.89 0.013 0.37 0.085 2.80 1.20 0.89 1.78 2.10 Max 1.12 0.100 0.51 0.18 3.04 1.40 1.03 2.05 2.64 0.55ref 0.89 0.45 1.12 0.60 10 - 12 AS1360 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 4. Table 4. Ordering Information Ordering Code Marking Description Delivery Form Package AS1360-18-T ASKD HV low-quiescent current LDO, 1.8V Tape and Reel 3-pin SOT23 AS1360-21-T ASRO HV low-quiescent current LDO, 2.1V Tape and Reel 3-pin SOT23 AS1360-25-T ASKE HV low-quiescent current LDO, 2.5V Tape and Reel 3-pin SOT23 AS1360-30-T ASKF HV low-quiescent current LDO, 3.0V Tape and Reel 3-pin SOT23 AS1360-33-T ASKG HV low-quiescent current LDO, 3.3V Tape and Reel 3-pin SOT23 AS1360-50-T ASKH HV low-quiescent current LDO, 5.0V Tape and Reel 3-pin SOT23 Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect For further information and requests, please contact us mailto:[email protected] or find your local distributor at http://www.austriamicrosystems.com/distributor www.austriamicrosystems.com/AS1360 Revision 1.04 11 - 12 AS1360 Datasheet Copyrights Copyright © 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 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. 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