SI9136LG Vishay, SI9136LG Datasheet

IC, PWM AND PSM CONVERTER CTRL, SSOP-28

SI9136LG

Manufacturer Part Number
SI9136LG
Description
IC, PWM AND PSM CONVERTER CTRL, SSOP-28
Manufacturer
Vishay
Datasheet

Specifications of SI9136LG

Primary Input Voltage
15V
No. Of Outputs
5
Output Voltage
12V
Output Current
1A
No. Of Pins
28
Operating Temperature Range
0°C To +90°C
Power Dissipation Pd
572mW
Termination Type
SMD
Number Of Outputs
3
Duty Cycle (max)
95 %
Mounting Style
SMD/SMT
Package / Case
SSOP-28
Switching Frequency
200 KHz
Operating Supply Voltage
- 0.3 V to + 36 V
Maximum Operating Temperature
+ 90 C
Minimum Operating Temperature
0 C
Synchronous Pin
No
Topology
Boost, Buck, Flyback
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SI9136LG
Manufacturer:
SI
Quantity:
20 000
The Si9136 is a current-mode PWM and PSM converter
controller, with two synchronous buck converters (3.3 V and
5 V) and a flyback (non-isolated buck-boost) converter (12 V).
Designed for portable devices, it offers a total five power
outputs (three tightly regulated dc/dc converter outputs, a
precision 3.3-V reference and a 5-V LDO output). It requires
minimum external components and is capable of achieving
Document Number: 70818
S-00583—Rev. C, 03-Apr-00
Control
Up to 95% Efficiency
3% Total Regulation (Each Controller)
5.5-V to 30-V Input Voltage Range
3.3-V, 5-V, and 12-V Outputs
200-kHz Low-Noise Fixed Frequency Operation
Precision 3.3-V Reference Output
30 mA Linear Regulator Output
(5.0 V)
+3.3 V
Inputs
V
V
IN
L
Multi-Output Power-Supply Controller
Regulator
Linear
SMPS
3.3-V
5-V
Power-Up Control
12-V SMPS
Reference
High Efficiency Pulse Skipping Mode Operation at
Light Load
Only Three Inductors Required No Transformer
LITTLE FOOT Optimized Output Drivers
Internal Soft-Start
Minimal External Control Components
28-Pin SSOP Package
Voltage
SMPS
3.3-V
5-V
conversion efficiencies approaching 95%.
The Si9136 is available in a 28-pin SSOP package and
specified to operate over the extended commercial (0 C to
90 C) temperature range.
www.vishay.com FaxBack 408-970-5600
Vishay Siliconix
V
(+3.3 V)
+5 V
+12 V
REF
Si9136
1

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SI9136LG Summary of contents

Page 1

... The Si9136 is available in a 28-pin SSOP package and specified to operate over the extended commercial ( temperature range. 5-V 3.3-V Linear Voltage Regulator Reference 3.3-V 5-V SMPS SMPS 12-V SMPS Power-Up Control Si9136 Vishay Siliconix V REF (+3 +12 V www.vishay.com FaxBack 408-970-5600 1 ...

Page 2

... L V Fault Lockout Voltage L V Fault Lockout Hysteresis L V /FB5 Switchover Voltage L V /FB5 Switchover Hysteresis L www.vishay.com FaxBack 408-970-5600 2 –0.3 to +36 V DH3 DH5 DHFY to LXFY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 V Continuous Power Dissipation (T –0 28-Pin SSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

... A No External Load All Converters OFF, No Load All Converters ON, No Load 200 kHz OCS DL3, DH3, DL5, DH5 Forced High or Low DHFY, DLFY Forced High or Low Part Number Temperature Range Si9136LG Evaluation Board Temperature Range Si9136DB Si9136 Vishay Siliconix Limits Min ...

Page 4

... Gate-drive output for 3.3-V buck low-side MOSFET. 25 BST Boost capacitor connection for 3.3-V buck converter Inductor connection for 3.3-V buck low-side MOSFET DH3 Gate-drive output for 3.3-V buck high-side MOSFET Feedback for 3.3-V buck. 3 www.vishay.com FaxBack 408-970-5600 4 Description Document Number: 70818 S-00583—Rev. C, 03-Apr-00 ...

Page 5

... Document Number: 70818 S-00583—Rev. C, 03-Apr-00 Efficiency vs. 5.0-V Output Current 100 Frequency = 200 kHz 0.001 Efficiency vs. 12-V Output Current Frequency = 200 kHz On, 3.3 V Off 0.001 0.01 0.1 Current (A) Si9136 Vishay Siliconix = 3.3 V Off Off 0.01 0 Current (A) 1 www.vishay.com FaxBack 408-970-5600 5 ...

Page 6

... Si9136 Vishay Siliconix 5-V Converter ( PWM Loading 5-V Converter ( PSM Õ PWM 5-V Converter ( PSM Operation www.vishay.com FaxBack 408-970-5600 6 5-V Converter (V Ch1: V OUT Ch2: Load Current (1 A/div) PWM Unloading 5-V Converter (V Ch1: V OUT Ch2: Load Current (1 A/div) PWM Õ PSM 5-V Converter (V ...

Page 7

... Current (1 A/div) PWM Õ PSM Start-Up Ch1: V OUT Ch4: Load Current (100 mA/div) Si9136 Vishay Siliconix = Ch1: V OUT Ch2: Load Current (1 A/div Ch1: V OUT Ch2: Load Current (1 A/div) 3.3-V Output 5-V Output 12-V Output Inductor Current, 5-V Converter (2 A/div) www.vishay.com FaxBack 408-970-5600 7 ...

Page 8

... Si9136 Vishay Siliconix 0 Si4416DY cs2 10 H 0.02 +3 Si4812DY C6 330 F +3 C11 1 F www.vishay.com FaxBack 408-970-5600 8 D1 CMPD2836 CMPD2836 0.1 F BST BST Si4416DY DH5 L1 DH3 Si4812DY DL5 DL3 CMPD2836 BSTFY 0 DHFY Si2304DS L3 LXFY D5, D1FS4 FB3 DLFY CSP 5 ON/OFF 3.3 ON/OFF 12 ON/OFF CSN ...

Page 9

... Low-side gate drive The converter is enabled V is applied IN LDO is activated after V is applied IN REF circuit is activated after V becomes L available After V goes above REF 2.4 V, the converter is turned on Oscillator is activated Slow soft-start gradually increases the maximum inductor current www.vishay.com FaxBack 408-970-5600 9 ...

Page 10

... Si9136 Vishay Siliconix RESET V REF OSC EN (Sysmon EN) OSC (SS) max www.vishay.com FaxBack 408-970-5600 FIGURE 4. Power Off Sequence 3.4 V Document Number: 70818 S-00583—Rev. C, 03-Apr-00 ...

Page 11

... FIGURE 5. Buck Block Diagram ON/OFF PWM Comparator – Logic Control + Pulse Skipping Control – + Current Limit FIGURE 6. PWM Flyback Block Diagram Si9136 Vishay Siliconix FB 5 CS_ R FB_ X Internal voltage divider is only used on 5-V output FBFY R1 R2 BSTY DH LXFY DHFY DL DLFY www.vishay.com FaxBack 408-970-5600 11 ...

Page 12

... Si9136 converts a 5.5-V to 30-V input voltage to five different output voltages; two buck (step-down) high current, PWM, switch-mode supplies of 3.3-V and 5-V, one “flyback” PWM switch-mode supply of 12-V, one precision 3.3-V reference www.vishay.com FaxBack 408-970-5600 12 5 ON/OFF 4.5 V Logic ...

Page 13

... V with 20-V input for the flyback converter. If this poses concerns on the MOSFET V resistor-zener circuit can be used: a resistor series with gate and zener diode across the gate and source to clamp its voltage. A 100- , 10-V combination works well. Si9136 Vishay Siliconix rating, a simple GS www.vishay.com FaxBack 408-970-5600 13 ...

Page 14

... Buck Converters: In order to simplify designs, the Si9136 requires no specified external components except load capacitors for stability control. Meanwhile, it achieves excellent regulation and www.vishay.com FaxBack 408-970-5600 14 efficiency. The converters are current mode control, with a bandwidth substantially higher than the LC tank dominant pole frequency of the output filter ...

Page 15

... Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’ ...

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