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.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
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
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
FUNCTIONAL BLOCK DIAGRAM
V
IN
V
L
(5.0 V)
5V
Linear
Regulator
3.3 V
Voltage
Reference
V
REF
(+ 3.3 V)
+ 3.3 V
3.3 V
SMPS
5V
SMPS
+5V
12 V SMPS
+ 12 V
Control
Inputs
Power-Up Control
Document Number: 70818
S11-0975-Rev. D, 16-May-11
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1
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Si9136
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Parameter
V
IN
to GND
P
GND
to GND
V
L
to GND
BST
3
, BST
5
, BSTFY to GND
V
L
Short to GND
LX
3
to BST
3
; LX
5
to BST
5
; LXFY to BST
Inputs/Outputs to GND (CS
3
, CS
5
, CSP, CSN)
5 ON/OFF, 3 ON/OFF, 12 ON/OFF
DL3, DL5 to PGND
DLFY to PGND
DH3 to LX
3
, DH5 to LX
5
, DHFY to LXFY
28-Pin SSOP
Continuous Power Dissipation (T
A
= 90 °C)
a
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 Sec.)
Notes:
a. Device Mounted with all leads soldered or welded to PC board.
b. Derate 9.25 mW/°C above 90 °C.
b
Limit
- 0.3 to + 36 V
±2
- 0.3 to + 6.5 V
- 0.3 V to + 36 V
Continuous
- 6.5 V to 0.3 V
- 0.3 V to (V
L
+ 0.3 V)
- 0.3 V to + 5.5 V
- 0.3 V to (V
L
+ 0.3 V)
Input of Flyback
- 0.3 V to (BSTX + 0.3 V)
572
0 °C to 90 °C
- 40 °C to 125 °C
300
Unit
V
V
V
mW
°C
Stresses beyond those listed under “Absolute Maximum Ratings” 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.
SPECIFICATIONS
Parameter
3.3 V Buck Controller
Total Regulation (Line, Load, and Temperature)
Line Regulation
Load Regulation
Current Limit
Bandwidth
Phase Margin
5 V Buck Controller
Total Regulation (Line, Load, and Temperature)
Line Regulation
Load Regulation
Current Limit
Bandwidth
Phase Margin
12 V Flyback Controller
Total Regulation (Line, Load, and Temperature)
Line Regulation
Load Regulation
Current Limit
Bandwidth
Phase Margin
Internal Regulator
V
L
Output
V
L
Fault Lockout Voltage
V
L
Fault Lockout Hysteresis
V
L
/FB5 Switchover Voltage
V
L
/FB5 Switchover Hysteresis
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2
Specific Test Conditions
V
IN
= 15 V , I
VL
= I
REF
= 0 mA
T
A
= 0 °C to 90 °C, All Converters ON
V
IN
= 6 to 30 V, 0 < V
CS3
- V
FB3
< 90 mV
V
IN
= 6 to 30 V
0 < V
CS3
- V
FB3
< 90 mV
V
CS3
- V
FB3
L = 10 µH, C = 330 µF
R
SENSE
= 20 m
V
IN
= 6 to 30 V, 0 < V
CS5
- V
FB5
< 90 mV
V
IN
= 6 to 30 V
0 < V
CS5
- V
FB5
< 90 mV
V
CS5
- V
FB5
L = 10 µH, C = 330 µF
R
SENSE
= 20 m
V
IN
= 6 to 30 V, 0 < V
CSP
- V
CSN
< 300 mV
V
IN
= 6 to 30 V
0 < V
CSP
- V
FBN
< 300 mV
V
CSP
- V
CSN
L = 10 µH, C = 100 µF
R
SENSE
= 100 m, C
comp
= 120 pF
All Converters OFF, V
IN
> 5.5, 0 < I
L
< 30 mA
Limits
Min.
a
3.23
Typ.
b
3.33
Max.
a
3.43
± 0.5
± 0.5
160
Unit
V
%
mV
kHz
°
V
%
mV
kHz
°
V
%
mV
kHz
°
90
125
50
65
5.03
4.88
90
125
50
65
12.0
5.18
± 0.5
± 0.5
160
11.4
330
410
10
65
12.6
± 0.5
± 0.5
500
4.7
3.6
75
4.2
75
5.5
4.2
4.7
V
mV
V
mV
Document Number: 70818
S11-0975-Rev. D, 16-May-11
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Si9136
Vishay Siliconix
SPECIFICATIONS
Parameter
Reference
REF Output
REF Load Regulation
Supply Current
Supply Current-Shutdown
Supply Current-Operation
Oscillator
Oscillator Frequency
Maximum Duty Cycle
Outputs
Gate Driver Sink/Source Current (Buck)
Gate Driver On-Resistance (Buck)
Gate Driver Sink/Source Current (Flyback)
Gate Driver On-Resistance (Flyback)
5 ON/OFF, 3 ON/OFF, and 12 ON/OFF
V
IL
V
IH
2.4
Notes:
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
0.8
V
DL3, DH3, DL5, DH5 Forced to 2 V
High or Low
DHFY, DLFY Forced to 2 V
High or Low
1
2
0.2
15
7
A
A
180
92
200
95
220
kHz
%
All Converters OFF, No Load
All Converters ON, No Load, F
OCS
= 200 kHz
35
1100
60
1800
µA
No External Load
0 to 1 mA
3.24
3.30
30
3.36
75
V
mV
Specific Test Conditions
V
IN
= 15 V , I
VL
= I
REF
= 0 mA
T
A
= 0 °C to 90 °C, All Converters ON
Limits
Min.
a
Typ.
b
Max.
a
Unit
PIN CONFIGURATION
SSOP-28
1
2
3
4
5
6
7
8
9
10
11
12
12
14
Top View
28
27
26
ORDERING DESCRIPTION
Part Number
Si9136LG
Evaluation Board
25
24
23
22
21
20
19
18
17
16
15
Temperature Range
0 °C to 90 °C
Temperature Range
0 °C to 90 °C
V
OUT
3.3 V, 5 V, 12 V
Board Type
Surface Mount
Si9136DB
Document Number: 70818
S11-0975-Rev. D, 16-May-11
www.vishay.com
3
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Si9136
Vishay Siliconix
PIN DESCRIPTION
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Symbol
CS
3
FBFY
BSTFY
DHFY
LXFY
DLFY
CSP
CSN
GND
COMP
REF
12 ON/OFF
3.3 ON/OFF
5 ON/OFF
CS
5
DH5
LX
5
BST
5
DL5
PGND
FB
5
V
L
V
IN
DL3
BST
3
LX
3
DH3
FB
3
Current sense input for 3.3 V buck.
Feedback for flyback.
Boost capacitor connection for flyback converter.
Gate-drive output for flyback high-side MOSFET.
Inductor connection for flyback converter.
Gate-drive output for flyback low-side MOSFET.
Current sense positive input for flyback converter.
Current sense negative input for flyback converter.
Analog ground.
Flyback compensation connection, if required.
3.3 V internal reference.
ON and OFF control input for 12 V flyback controller.
ON and OFF control input for 3.3 V buck controller.
ON and OFF control input for 5 V buck controller.
Current sense input for 5 V buck controller.
Inductor connection for buck 5 V.
Gate-drive output for 5 V buck high-side MOSFET.
Boost capacitor connection for 5 V buck converter.
Gate-drive output for 5 V buck low-side MOSFET.
Power ground.
Feedback for 5 V buck.
5 V logic supply voltage for internal circuitry.
Input voltage
Gate-drive output for 3.3 V buck low-side MOSFET.
Boost capacitor connection for 3.3 V buck converter.
Inductor connection for 3.3 V buck low-side MOSFET.
Gate-drive output for 3.3 V buck high-side MOSFET.
Feedback for 3.3 V buck.
Description
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Document Number: 70818
S11-0975-Rev. D, 16-May-11
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Si9136
Vishay Siliconix
TYPICAL CHARACTERISTICS
(25 °C, unless otherwise noted)
100
Frequency = 200 kHz
90
V
IN
= 6 V
Efficiency (%)
80
30 V
70
5 V On, 12 V Off
60
60
Efficiency (%)
15 V
80
30 V
90
V
IN
= 6 V
15 V
100
Frequency = 200 kHz
70
3.3 V Off, 12 V Off
50
0.001
0.01
0.1
Current (A)
1
10
50
0.001
0.01
0.1
Current (A)
1
10
Efficiency vs. 3.3 V Output Current
Efficiency vs. 5.0 V Output Current
85
Frequency = 200 kHz
80
6V
75
Efficiency (%)
30 V
V
IN
= 15 V
70
65
5 V On, 3.3 V Off
60
55
0.001
0.01
Current (A)
0.1
1
Efficiency vs. 12 V Output Current
Document Number: 70818
S11-0975-Rev. D, 16-May-11
www.vishay.com
5
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
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