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SA57005 Multiple output low noise, low dropout linear regulator
Product data 2002 Jun 20
Philips Semiconductors
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
GENERAL DESCRIPTION
The SA57005 is a very low dropout, low noise composite voltage regulator with three fixed independent outputs. The output voltages are preset to 2.5 V, 2.8 V and 3.0 V having a common input voltage pin VIN. Two ON/OFF switches allow Vo1 and Vo2/Vo3 to be turned off when not needed, thus conserving power. Also, three regulators in one package save board space, which is critical in microprocessor systems. Designed for battery-powered and portable applications the SA57005 achieves unequalled performance in all specifications such as low supply-current, low dropout voltage, low power consumption, small size, fast dynamic response to line and load, precision output and so on. Each of these regulators consists of an internal voltage reference, an error amplifier, resistors, and control switch. The SA57005 is housed in a VSOP-8A 8-lead package.
FEATURES
* Very low dropout voltage:
Vo3: 0.30 V typ.
APPLICATIONS
Vo1: 0.25 V typ.; Vo2: 0.28 V typ.;
* Low noise: 60 Vrms typ. (f = 10 Hz to 10 kHz; IO = 30 mA) * High precision output voltage: 3% * Output current capacity: * Low consumption current:
Io1 and Io2 = 100 mA max; Io3 = 150 mA max. IIN1 = 250 A typ., IIN2/IIN3 = 500 A typ. (when not loaded), 3 A max. (when off)
* Cellular phones, cordless phones and 2-way radios * Electronic notebooks, PDAs and Palmtop computers * Cameras, VCRs and camcorders * Modems * Battery-powered or hand-held instruments
* Line regulation: 1%/V typ. (IOUT = 30 mA; VIN = 4.0 to 8.0 V) * Load regulation: 30 mV typ. for IOUT = 0 to 70 mA * Low temperature drift co-efficient to VOUT: 100 ppm/C * Thermal shutdown * Wide operating temperature range: -20 C to +75 C
SIMPLIFIED DEVICE DIAGRAM
1 2 3 4 PS1 PS2/3
GND Vo1
8 7 6 5 1 1 F 1 1 F 1 1 F
SA57005
NC VIN Vo2 Vo3
1 F
SL01698
Figure 1. Simplified device diagram.
2002 Jun 20
2
853-2352 28505
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
ORDERING INFORMATION
PACKAGE TYPE NUMBER SA57005DH NAME VSOP-8A DESCRIPTION 8-pin surface mount small outline package Part Number SA57005DH TEMPERATURE RANGE -20 to +75 C Marking AHXx
Part number marking
Each device is marked with a four letter code on the first line. The first three letters designate the product. The fourth letter, represented by `x' is a date tracking code. Any other lines contain manufacturing codes.
PIN CONFIGURATION
PS1 PS2/3 NC VIN 1 2 3 4 TOP VIEW 8 7 GND Vo1 Vo2 Vo3
PIN DESCRIPTION
PIN 1 2 3 4
SL01697
SYMBOL PS1 PS2/3 NC VIN Vo3 Vo2 Vo1 GND
DESCRIPTION ON/OFF control for Vo1; tie to VIN if ON/OFF function is not used. ON/OFF control for Vo2 and Vo3; tie to VIN if ON/OFF function is not used. No connection Input voltage Regulated output 3 Regulated output 2 Regulated output 1 Ground
SA57005
6 5
5 6 7 8
Figure 2. Pin configuration.
MAXIMUM RATINGS
SYMBOL VIN IO1, IO2 IO3 Topr Tstg PD Supply voltage Output current 1, 2 Output current 3 Operating ambient temperature range Storage temperature Power dissipation unmounted when mounted on glass epoxy board (40 x 40 x 1.6 mm) PARAMETER CONDITIONS Min. -0.3 - - -20 -40 - - Max. +12 100 150 +75 +125 300 500 UNIT V mA mA C C mW mW
2002 Jun 20
3
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
ELECTRICAL CHARACTERISTICS
Tamb = 25 C; VIN = 4 V; CIN = 2.2 F; CVO(n) = 2.2 F; unless otherwise specified. SYMBOL IIN(OFF) IIN1, IIN2, IIN3 PARAMETER Supply current (OFF) Supply current 1, 2, 3 IIN1 IIN2, IIN3 Vo1 Vo1 Vio(dif)(min)1 VLO1 VLI1 Vo1/T RR1 Vn1 tDH1 Vo2 Vo2 Vio(dif)(min)2 VLO2 VLI2 Vo2/T RR2 Vn2 tDH2 Vo3 Vo3 Vio(dif)(min)3 VLO3 VLI3 Vo3/T RR3 Vn3 tDH3 VOFF VON IPS1 IPS2/3 Output voltage Input/output differential voltage Load regulation Line regulation VO temperature coefficient (Note 1) Ripple rejection (Note 1) Output noise voltage (Note 1) Output delay time (Note 1) LOW-level threshold voltage HIGH-level threshold voltage PS1 terminal current PS2/3 terminal current VPS1 = 1.6 V VPS2/3 = 1.6 V IO3 = 80 mA VIN = 2.8 V; IO3 = 80 mA IO3 = 0 to 100 mA VIN = 4.0 V to 8.0 V; IO3 = 30 mA Tamb = -20 C to +75 C; IO3 = 30 mA f = 120 Hz; Vripple = 1 Vp-p; IO3 = 30 mA f = 10 Hz to 10 kHz; IO3 = 30 mA IO3 = 30 mA; VPS2/3 = 0 V 4 V 2.92 - - - - 50 - - - 1.6 - - 3.00 0.15 30 10 100 60 60 0.04 - - - - 3.08 0.30 60 25 - - 90 0.15 0.4 - 8 16 V V mV mV ppm/C dB Vrms ms V V A A Output voltage Input/output differential voltage Load regulation Line regulation VO temperature coefficient (Note 1) Ripple rejection (Note 1) Output noise voltage (Note 1) Output delay time (Note 1) IO2 = 30 mA VIN = 2.6 V; IO2 = 30 mA IO2 = 0 to 70 mA VIN = 4.0 V to 8.0 V; IO2 = 30 mA Tamb = -20 C to +75 C; IO2 = 30 mA f = 120 Hz; Vripple = 1 Vp-p; IO2 = 30 mA f = 10 Hz to 10 kHz; IO2 = 30 mA IO2 = 30 mA; VPS2/3 = 0 V 4 V; VPS1 = 0 V 2.72 - - - - 50 - - 2.80 0.1 30 10 100 60 60 0.04 2.88 0.25 60 25 - - 90 0.15 V V mV mV ppm/C dB Vrms ms Output voltage Input/output differential voltage Load regulation Line regulation VO temperature coefficient (Note 1) Ripple rejection (Note 1) Output noise voltage (Note 1) Output delay time (Note 1) IO1 = 30 mA VIN = 2.3 V; IO1 = 30 mA IO1 = 0 to 70 mA VIN = 4.0 V to 8.0 V; IO1 = 30 mA Tamb = -20 C to +75 C; IO1 = 30 mA f = 120 Hz; Vripple = 1 Vp-p; IO1 = 30 mA f = 10 Hz to 10 kHz; IO1 = 30 mA IO1 = 30 mA; VPS1 = 0 V 4 V; VPS2/3 = 0 V 2.42 - - - - 50 - - 2.50 0.1 30 10 100 60 60 0.04 2.58 0.25 60 25 - - 90 0.15 V V mV mV ppm/C dB Vrms ms no load VPS1 = 3 V; VPS2/3 = 0 V VPS2/3 = 3 V; VPS1 = 0 V - - 250 500 370 740 A A CONDITIONS VPS1 = VPS2/3 = 0 V Min. - Typ. 0 Max. 3 UNIT A
PS output control pin
NOTE: 1. Guaranteed by design.
2002 Jun 20
4
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
TYPICAL PERFORMANCE CURVES
250.0 20.0
LINE REGULATION (mV)
200.0 INPUT-OUTPUT (mV)
10.0
150.0
0.0
100.0
-10.0 50.0
0.0 0 50 100 150
-20.0 4 6 8 VIN (V) 10 12
OUTPUT CURRENT (mA)
SL01699
SL01700
Figure 3. Input-output differential voltage.
Figure 4. Line regulation.
40.0 30.0 OUTPUT VOLTAGE (V) LOAD REGULATION (mV) 20.0 10.0 0.0 -10.0 -20.0 -30.0 -40.0 0 50 100 150
4.0
3.0
2.0
1.0
0.0 0 50 100 TEMPERATURE (C) 150 200
OUTPUT CURRENT (mA)
SL01703
SL01702
Figure 5. Load regulation.
Figure 6. Thermal shutdown.
4.0 EQUIVALENT SERIES RESISTANCE ( )
100 UNSTABLE
OUTPUT VOLTAGE (V)
3.0
10
STABLE 1
2.0
1.0
0.1 UNSTABLE
0.0 0 100 200 300
0.01 0 50 100 150 OUTPUT CURRENT (mA) LOAD CURRENT (mA)
SL01701
SL01708
Figure 7. Current limit.
Figure 8. ESR stability.
2002 Jun 20
5
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
800 700 POWER DISSIPATION (mW) 600 500 400 300 200 ALONE 100 0 0 50 100 150 ON BOARD (40 x 40 x 1.6 mm)
TEMPERATURE (C)
SL01704
Figure 9. Power dissipation.
2002 Jun 20
6
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
TECHNICAL DISCUSSION
As illustrated in the circuit diagram, each of the regulators in the SA57005 consists of a voltage reference, an error amplifier, P-channel pass transistor, current limit circuit and an internal feedback voltage divider. The output voltage is fed back through an internal resistor voltage divider connected to the output voltage pins. The reference will be activated if any of the PS1 and PS2/3 switches is turned on.
The reference is connected to the error amplifier's non-inverting input. The error amplifier compares the reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage the output of the error amplifier goes up, which pulls down the pass transistor's gate. This allows more current to pass to the output and increase the output voltage. On the other hand, if the feedback voltage is too high the pass transistor gate is pulled up, allowing less current to pass to the output, resulting a decrease in output voltage.
VIN 4
PS1 1
7 Vo1
TERMINAL PROTECT
6 Vo2
PS2/3 2
5 Vo3
8 GND
SL01705
Figure 10. Functional diagram.
2002 Jun 20
7
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
APPLICATION INFORMATION
For good performance, the following points must be considered:
PS (Chip Enable) pins
These active-HIGH ON/OFF pins must be actively terminated. If the function is not to be used, the corresponding PS pin should be tied to VIN. PS1 (pin 1) controls Vo1 while PS2/3 (pin 2) controls Vo2 and Vo3 simultaneously. In other words Vo2 and Vo3 are always in the same state, either both active or both inactive depending on the input of PS2/3.
Input capacitor
An input capacitor of 1 F is required between the SA57005 input and the ground (the amount of capacitance may be increased without limit). This capacitor must be located as close as possible to VIN or GND pin (not more than 1 cm) and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitor will work.
Line impedance of VIN and GND
The VIN and GND lines should be sufficiently wide. Otherwise when the impedance of these lines is high, there is a chance to pick-up noise or malfunction.
Output capacitor
Phase compensation is made for securing stable operation even if the load current varies. For this reason, an output capacitor with good frequency characteristics is needed at each of the three outputs. Set it as close to the circuit as possible and make the wiring as short as possible. The value of the output capacitance has to be at least 1F. Also it must have the ESR (Equivalent Series Resistance) value within the stable range shown Figure 8.
1 F 1 Vo1
1 F 1 Vo2
1 F 1 Vo3
8 GND
7 Vo1
6 Vo2
5 Vo3
SA57005
PS1 1 PS2/3 2 NC 3 VIN 4
VIN
1 F
SL01706
Figure 11. Typical application circuit.
2002 Jun 20
8
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
TEST CIRCUIT
IO1
IO2
IO3
8 GND
7 Vo1
6 Vo2
5 Vo3
SA57005
PS1 1 PS2/3 2 NC 3 VIN 4
VPS1
VPS2/3
VIN
SL01707
Figure 12. Test circuit.
PACKING METHOD
GUARD BAND TAPE REEL ASSEMBLY
TAPE DETAIL
COVER TAPE
CARRIER TAPE
BARCODE LABEL
BOX
SL01305
Figure 13. Tape and reel packing method.
2002 Jun 20
9
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
VSOP-8A: plastic small outline package; 8 leads; body width 4.4 mm
A 1.35 1.15 1.15 0.23 0.21 0.16 0.10 3.4 2.8 4.6 4.2 6.7 6.1 0.7 0.3 0.12 0.875 max. 10 0
VSOP-8A
2002 Jun 20
10
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
NOTES
2002 Jun 20
11
Philips Semiconductors
Product data
Multiple output low noise, low dropout linear regulator
SA57005
Data sheet status
Data sheet status [1] Objective data Preliminary data Product status [2] Development Qualification Definitions This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Changes will be communicated according to the Customer Product/Process Change Notification (CPCN) procedure SNW-SQ-650A.
Product data
Production
[1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified.
Contact information
For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825
(c) Koninklijke Philips Electronics N.V. 2002 All rights reserved. Printed in U.S.A. Date of release: 08-02
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
Document order number:
9397 750 10161
Philips Semiconductors
2002 Jun 20 12

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