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Datasheet
AS1360
1 . 5 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
The AS1360 low-power, positive voltage regulator was designed to deliver up to 250mA while consuming only 1.5A 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. The device features integrated short-circuit and overcurrent protection. 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. 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 1F tantalum or aluminum-electrolytic capacitors), strict output voltage regulation tolerances (0.5%), and excellent line-regulation. The AS1360 is available in a 3-pin SOT23 package.
2 Key Features
! ! !
Low Quiescent Current: 1.5A Input Voltage Range: Up to 20V Low Dropout Voltage - 250mV @ 100mA - 400mV @ 200mA
! ! ! ! ! ! !
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/C Integrated Short-Circuit and Overcurrent Protection 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 VIN
2 VOUT
Short-Circuit Protection + - Voltage Reference
AS1360
GND 1
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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 2
3
VIN
3-pin SOT23
Pin Descriptions
Table 1. Pin Descriptions Pin Number Pin Name Description 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 (1.5A, typ). Note: Voltage drops between this pin and the negative side of the load should be minimized. 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. 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.
1
GND
2
VOUT
3
VIN
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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 Input Voltage Continuous Output Current Peak Output Current Output Voltage Thermal Resistance JA Operating Temperature Range Storage Temperature Range Electrostatic Discharge (ESD) Protection Level -40 -40 1 - 0.3V Min Max +30 PD/ (VIN - VOUT) 500 VIN + 0.3V or +7V 230 +85 +125 Units V mA mA V C/W C C kV HBM - Norm: MIL 883 E methode 3015 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". Minimum of the two values Typical FR4, 4-layer application Comments
Package Body Temperature
+260
C
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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 = +25C (unless otherwise specified). Table 3. Electrical Characteristics Symbol VIN VOUT Parameter Input Voltage Output Voltage
1
Condition
Min
Typ
Max 20
Unit V 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 VOUT/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 VOUT x 100/ IOUT = 40mA, Line Regulation 0.1 0.25 VIN 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 -40C TAMB +85C of VOUT 10% VOUTNOM to 90% VOUTNOM, tR Output Rise Time VIN = 0V to VOUTNOM + 1V, 150 RLOAD = 25 resistive 1. VOUTNOM is the nominal device output voltage. 2. Measured at a constant junction temperature using low duty cycle pulse testing. 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.
6
mA
%
%/V
mV
A ppm/ C s
Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods.
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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 = 100A, VIN = 4.3V, CIN 1F (tantalum), COUT = 1F (tantalum), TAMB = +25C (unless otherwise specified). Figure 3. Supply Current vs. Input Voltage
1.9 1.8
Figure 4. Supply Current vs. Load Current
1.9 1.8
85C
Supply Current (A) .
1.7 1.6 1.5
Supply Current (A) .
85C
1.7 1.6 1.5 1.4 1.3
-40C 25C 0C
25C
1.4
0C
1.3 1.2 1.1 4 5 6 7 8 9 10
-40C
1.2 1.1 0 25 50 75 100 125 150 175 200
Input Voltage (V) Figure 5. Supply Current vs. Temperature
1.9 1.8
Load Current (mA) Figure 6. Output Voltage vs. Input Voltage
3.312 3.31
25C 0C
Supply Current (A) .
Output Voltage (V) .
1.7 1.6 1.5 1.4 1.3 1.2 1.1 -40 -20
3.308 3.306 3.304 3.302
-40C
3.3 3.298 3.296
85C
0
20 40 60 80 100 120 140
4
5
6
7
8
9
10
Temperature (C) Figure 7. Output Voltage vs. Load Current
3.31 3.3
25C
Input Voltage (V) Figure 8. Dropout Voltage vs. Load Current
700
85C
3.29 3.28 3.27 3.26 3.25 3.24 3.23 0 10 20 30 40 50 60
85C -40C 0C
Dropout Voltage (mV) .
600 500 400 300 200 100 0
-40C 25C 0C
Output Voltage (V) .
70
80
0
20
40
60
80 100 120 140 160
Load Current (mA) www.austriamicrosystems.com/AS1360 Revision 1.04
Load Current (mA) 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
2.5 2.3
Figure 10. Line Regulation vs. Temperature
0.2
Load Regulation (%) .
2.1 1.9 1.7 1.5 1.3 1.1
VIN = 4.3V VIN = 6V
Line Regulation (%/V) .
VIN = 10V
0 -0.2 -0.4 -0.6 -0.8 -1 -1.2 -40
1mA / 10mA 40mA
0.9 0.7 0.5 -40 -15 10 35 60 85
150mA
-15
10
35
60
85
Temperature (C)
Temperature (C)
Figure 11. Output Voltage vs. Input Voltage; Dropout
2 1.8 1.6
Figure 12. Startup Rise Time
Output Voltage (V)
1.4 1.2
VOUT 500mV/Div 50s/Div
1 0.8 0.6 0.4 0.2 0 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6
Iload = 40mA Iload = 100mA
Input Voltage (V)
Figure 13. Startup Delay
VOUT
1V/Div
2V/Div
VIN
10ms/Div
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
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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.
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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 CIN 1F
*
VIN
AS1360
2 VOUT COUT 1F
*
VOUT = 3.3V
GND
*
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 Total AS1360 power dissipation is calculated as: PD(Total) = PD (P-Channel MOSFET) + PD (Bias) (EQ 3) The internal quiescent bias current (2A, 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) Where: VIN = 3.3 to 4.1V VOUT = 3.0V 2% IOUT = 1 to 100mA TAMB(MAX) = 55C PMAX = (4.1V - (3.0V x 0.98)) x 100mA = 116.0mW (EQ 4) (EQ 2)
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 RJA, and is approximately 230C/W or 335C/W (when mounted on 1 square inch of copper). RJA 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 RJA + TAMB From (EQ 5), the value of TJ can be calculated as: TJ = 116.0mW x 230C/W + 55C Therefore: TJ = 81.68C (EQ 5)
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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 10, a 1F 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 > 1F, the value of CIN should be increased to prevent high source-impedance oscillations.
Output Capacitor
In most applications for the AS1360, a 1F capacitor (ESR > 0.1/< 5, 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 > 1F, the input impedance must not be so large that it causes high-input impedance oscillations.
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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.
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 0.55ref 0.89 0.45
Max 1.12 0.100 0.51 0.18 3.04 1.40 1.03 2.05 2.64 1.12 0.60
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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 AS1360-18-T AS1360-21-T AS1360-25-T AS1360-30-T AS1360-33-T AS1360-50-T Marking ASKD ASRO ASKE ASKF ASKG ASKH Description HV low-quiescent current LDO, 1.8V HV low-quiescent current LDO, 2.1V HV low-quiescent current LDO, 2.5V HV low-quiescent current LDO, 3.0V HV low-quiescent current LDO, 3.3V HV low-quiescent current LDO, 5.0V Delivery Form Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Package 3-pin SOT23 3-pin SOT23 3-pin SOT23 3-pin SOT23 3-pin SOT23 3-pin SOT23
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AS1360
Datasheet
Copyrights
Copyright (c) 1997-2009, 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.
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
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