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AS1357
P r o g r a m m a b l e Tr i p l e L D O
D a ta S he e t
1 General Description
The AS1357 is a high-performance triple CMOS lowdropout voltage regulator in a single QFN package. The efficient set of programmable power supplies is optimized to deliver the best compromise between quiescent current and regulator performance for mobile phones, PDAs, MP3 players, and other battery powered devices. The one-time-programmable (OTP) function provides greater design flexibility by allowing for independent programming of the output voltage for each regulator onsite. The OTP function allows for fast prototyping reducing development times and costs significant. Factory trimmed versions for full-production are also available. Stability is guaranteed with ceramic output capacitors of only 1F (20% - X5R) up to 4.7F (20% - X5R). The low equivalent series resistance (ESR) of these capacitors ensures low output impedance at high frequencies. Regulation performance is excellent even under low dropout conditions, when the power transistor has to operate in linear mode. The low-noise performance allows direct connection of noise sensitive circuits without additional filtering networks. The AS1357 is available in a 12-pin QFN 4x4 or 16-pin QFN 3x3 package.
2 Key Features
! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
3 Independent Voltage Regulators with Shutdown Output Current: 200mA each LDO One Time Programmable Output Voltage (User- or Factory-Trimmed) Programmable Output Voltage Range: 1.8 to 3.3V in 0.1V Steps Accuracy: 1.5% PSRR: 70dB at 1kHz, 40dB at 100kHz Line Regulation: 2mV Load Regulation: 0.6mV Supply Range: 3 to 5.5V 0.2V Dropout Voltage @ I = 200mA Shutdown Current: 1A Supply Current Without Load: 175A (typ) Softstart for Low Inrush Current Stable with low ESR Ceramic Capacitors from 1 to 4.7F Low Noise: 40V rms @10Hz to 100kHz Bandwidth Thermal Protection Over-Current Protection Temperature Range: -40 to +85C Package Types: 12-pin QFN 4x4 and 16-pin QFN 3x3
3 Applications
The AS1357 is ideal for cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held battery-powered device. Figure 1. Pinout Assignments (Top View)
EN3 12 N/C 11 REF 10 EN1 EN2 1 9 GND VDD 8 VDD VDD 7 4 5 6 N/C VDD
13
EN2 16 1
EN3 15
N/C 14
REF 13 12 GND
AS1357
EN1 2 12-pin QFN 4x4
2
AS1357
16-pin QFN 3x3
11 GND
3
10 VDD
VDD
3
4 5 6 7 8 N/C
9
VDD
GND
VOUT1 VOUT2 VOUT3
(Exposed Pad)
VOUT1 VOUT2 VOUT3
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AS1357 Data Sheet
- Pinout
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View - Not To Scale)
EN3 12 N/C 11 REF 10 EN1 EN2 1 9 GND VDD 8 VDD VDD 7 4 5 6 N/C VDD
13
EN2 16 1
EN3 15
N/C 14
REF 13 12 GND
AS1357
EN1 2 12-pin QFN 4x4
2
AS1357
16-pin QFN 3x3
11 GND
3
10 VDD
VDD
3
4 5 6 7 8 N/C
9
VDD
GND
VOUT1 VOUT2 VOUT3
(Exposed Pad)
VOUT1 VOUT2 VOUT3
Pin Descriptions
Table 1. Pin Descriptions 12-pin QFN 4x4 16-pin QFN 3x3 Pin Number Pin Number 2 1 12 9 13 10 3, 8 4 5 6 7,11 1 16 15 11, 12 13 2, 3, 4, 9, 10 5 6 7 8, 14 Pin Name EN1 EN2 EN3 GND GND REF VDD VOUT1 VOUT2 VOUT3 N/C Description VOUT1 Digital Input Enable VOUT2 Digital Input Enable VOUT3 Digital Input Enable Negative Supply Voltage. Note: All GND pins must be connected together externally. Negative Supply Voltage. This pin is the exposed pad. Note: All GND pins must be connected together externally. Analog Reference Voltage. Note: Connect to 100nF capacitor during normal operation. Positive Supply Voltage. Note: All VDD pins must be connected together externally. Regulated Analog Output Voltage 1 Regulated Analog Output Voltage 2 Regulated Analog Output Voltage 3 Not connected.
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AS1357 Data Sheet
- Absolute Maximum Ratings
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 the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter VDD to GND Any other pin to GND Continuous Power Dissipation QFN12 4x4mm Package-Body Peak Temperature Operating Temperature Storage Temperature Electrostatic Discharge Protection (ESD) Level -40 -65 1 Min -0.3 -0.3 1100 Max 7 VDD + 0.3 2800 Units V V mW Min value measured at TAMB = 85C; max value measured at TAMB = 25C. The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020C "Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices". Comments
260
C
85 150
C C kV HBM - Norm: MIL 883 E method 3015.
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AS1357 Data Sheet
- Electrical Characteristics
6 Electrical Characteristics
VDD = 4V; TAMB = -40 to +85C (Typ values are for TAMB = 25C); CLOAD = 1F (Ceramic); unless otherwise specified. Table 3. Electrical Characteristics Symbol VDD VOUT RON PSRR 1 IOFF IVDD tset 1 Parameter Supply Voltage Range Output Voltage Range On Resistance Power Supply Rejection Ratio Shut Down Current Supply Current Output Voltage Settling Time f = 1kHz, CREF = 100nF f = 100kHz, CREF = 100nF ENx = Low Without Load ILOAD Switched from 0 to 100mA CREF = 100nF Pre-charged tstart 1 Start-up Time 2 CREF = 0nF Uncharged CREF = 100nF Uncharged VOUT Output Voltage Tolerance ILOAD = 0mA, TAMB = 25C ILOAD = 0 to 200mA VDD = 5.5V VLINEREG Line Regulation, Static VDD = 3 to 4.5V ILOAD = 0 to 50 mA VLOADREG VIH VIL ILOAD ILIMIT VNoise Load Regulation, Static Enable Input Voltage High Enable Input Voltage Low Output Current Output Current Limitation Output Noise Voltage Thermal Protection Notes: 1. Guaranteed by design and verified by lab evaluation. 2. Startup is performed if any EN pin goes high. 10 to 100kHz, CREF = 100nF 0 400 40 145 ILOAD = 0 to 200 mA (referenced to 100mA) 0.6 x VDD 0.8 200 -1.5 -2 -1 -2 0.3 0.6 300 15 1.5 2 1 2 2.5 5 175 70 40 1 275 50 300 Conditions Min 3 1.8 Typ Max 5.5 3.3 1 Unit V V dB A A s s s ms % % % mV 1 mV 1 mV 1 V V mA mA VRMS C
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AS1357 Data Sheet
- Ty p i c a l A p p l i c a t i o n
7 Typical Application
Figure 3. Typical AS1357_uxy Application
VDD 3V
VOUT1
2.8V VPERI 1F 20% (X5R) 2.2F +100/-50% (Z5U)
CMOS Sensor
VOUT2
2.5V VCORE 1F 20% (X5R) 2.2F +100/-50% (Z5U)
VOUT3
2.8V VPERI 1F 20% (X5R) 2.2F +100/-50% (Z5U)
Microprocessor
EN1 EN2
Microprocessor
EN3
AS1357_A7A
REF 100nF (Improved Noise Performance)
GND GND
One-Time Programming Procedure Output Voltages
The three LDOs can be programmed and burned to any output voltage between 1.8 and 3.3V in steps of 0.1V. Customers can burn the desired output voltages onsite using the austriamicrosystems programming board. Furthermore, the AS1357 is available in pre-programmed versions with fixed output voltages (see Ordering Information on page 9.)
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AS1357 Data Sheet
- Ty p i c a l A p p l i c a t i o n
Figure 4. AS1357 Block Diagram
VDD
Thermal Protection Overcurrent Protection Softstart
VOUT1
VREF EN1
Control
VOUT2
Thermal Protection Overcurrent Protection Softstart
VREF EN2
Control
VDD
Thermal Protection Overcurrent Protection Softstart
VOUT3
VREF EN3
Control
Reference Voltage
REF
GND
AS1357
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AS1357 Data Sheet
- Package Drawings and Markings
8 Package Drawings and Markings
The AS1357 is available in a 12-pin QFN 4x4 package and a 16-pin QFN 3x3 package. Figure 5. 12-pin QFN 4x4 and 16-pin QFN 3x3 Packages
-AD2 D2/2
D D/2
Index Area (D/2 xE/2) 4
-BNXL E2/2
E/2
e
-B-
aaa C 2x
See Detail B Pin 1 Marker
Index Area (D/2 xE/2)
E
2 1
-A-
N N-1 6 SEE Detail B
NXb bbb ddd
5 CAB C
aaa C 2x
4
Top View
ccc C
Bottom View
8
9
11
NX
0.08 C
A
Seating Plane
-C-
A1
A3
Side View
Datum A or B
Datum A or B
12 L1
12 L1
e/2 e
Even Terminal Side
Terminal Tip
e
Terminal Tip
5
5
Odd Terminal Side
Detail B
Notes: 1. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters; angles in degrees.
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E2
AS1357 Data Sheet
3. N is the total number of terminals. 4. The terminal #1 identifier and terminal numbering convention shall conform to JEDEC 95 SPP-012. Details of terminal #1 identifier are optional but must be located within the zone indicated. The terminal #1 identifier may be either a mold or marked feature. 5. Dimension b applies to metallized terminal and is measured between 0.15 and 0.30mm from terminal tip. If one end of the terminal has the optional radius, the b dimension should not be measured in that radius area. 6. Dimensions ND and NE refer to the number of terminals on each D and E side, respectively. 7. Depopulation is possible in a symmetrical fashion. 8. Figure 5 is shown for illustration only and does not represent any specific variation. 9. All variations may be constructed per Figure 5, however variations may alternately be constructed between square or rectangle shape per dimensions D and E. 10. Refer to the Dimensions Table for a complete set of dimensions. 11. Bilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals. 12. Depending on the method of lead termination at the edge of the package, pullback (L1) may be present. L minus L1 to be 0.33mm. 13. For variations with more than one lead count for a given body size and terminal pitch, each lead count for that variation is denoted by a dash number (e.g., -1 or -2).
16-pin QFN 3x3 Dimensions Symbol aaa bbb ccc ddd b e A A1 A3 L1 D BSC E BSC D2 E2 L N ND NE 1.30 1.30 0.30 0.03 3.00 3.00 1.45 1.45 0.40 16 4 4 1.55 1.55 0.50 0.80 0.00 0.18 Min Nom 0.15 0.10 0.10 0.05 0.25 0.50 0.90 0.02 0.20 REF 0.15 1.00 0.05 1, 2 1, 2 1, 2 1, 2 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 0.30 Max Notes 1, 2 1, 2 1, 2 1, 2 1, 2 aaa bbb ccc ddd b e A A1 A3 L1
12-pin QFN 4x4 Dimensions Symbol Min Nom 0.15 0.10 0.10 0.05 0.25 0.80 0.00 0.30 0.80 0.90 0.02 0.20 REF 0.03 4.00 4.00 2.00 2.00 0.45 2.15 2.15 0.55 12 3 3 2.25 2.25 0.65 0.15 1.00 0.05 1, 2 1, 2 1, 2 1, 2 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 1, 2, 10 0.35 Max Notes 1, 2 1, 2 1, 2 1, 2 1, 2
D BSC E BSC D2 E2 L N ND NE
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AS1357 Data Sheet
9 Ordering Information
The AS1357 is available with preset LDO output voltages or customer-specific versions (with a minimum order quantity of 30,000). Each customer-specific device is factory trimmed to the desired output voltage (see Table 9). Table 4. Ordering Information Part AS1357-T AS1357 AS1357V-T 2 AS1357V
2
LDO Values User-programmable LDO values User-programmable LDO values User-programmable LDO values Customer-specific LDO values Customer-specific LDO values
1 1
Delivery Form Tape and Reel Tray Tape and Reel Tray Tape and Reel -----
Package 12-pin QFN 4x4 12-pin QFN 4x4 16-pin QFN 3x3 16-pin QFN 3x3 12-pin QFN 4x4 12-pin QFN 4x4 16-pin QFN 3x3
User-programmable LDO values 1
1
AS1357_A7A-T AS1357_uxy-T 3, 4 AS1357V_uxy-T 2, 3, 4
VOUT1 = 2.8V, VOUT2 = 2.5V, VOUT3 = 2.8V
1. The values are programmed via the AS1352/57 programming board. 2. Available upon request. Contact austriamicrosystems, AG for more information. 3. Customer-specific values are as follows: u = Customer-specific VOUT1 value suffix. x = Customer-specific VOUT2 value suffix. y = Customer-specific VOUT3 value suffix. 4. "-T" suffix for tape and reel, no suffix for tray delivery form. Table 5. Output Voltages Suffix Guide Part Suffix F E D C B A 9 AS1357_uxy 8 7 6 5 4 3 2 1 0 Output Voltage 3.3 V 3.2 V 3.1 V 3.0 V 2.9 V 2.8 V 2.7 V 2.6 V 2.5 V 2.4 V 2.3 V 2.2 V 2.1 V 2.0 V 1.9 V 1.8 V
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AS1357 Data Sheet
- Ordering Information
Copyrights
Copyright (c) 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 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 lifesustaining 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
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