SI9137LG-E3 Vishay, SI9137LG-E3 Datasheet - Page 4

• Manufacturer Part Number: SI9137LG-E3
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,BICMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Vishay

Specifications of SI9137LG-E3

• Duty Cycle (max): 95 %
• Output Voltage: 3.3 V, 5 V, 5 V to ADJ V
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Switching Frequency: 330 KHz
• Maximum Operating Temperature: + 90 C
• Minimum Operating Temperature: 0 C
• Synchronous Pin: No
• Topology: Boost, Buck, Flyback
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Si9137
Vishay Siliconix
www.vishay.com
4
RUN/STOP
PIN CONFIGURATION
PIN DESCRIPTION
RESET
BSTFY
COMP
Pin
DHFY
FBFY
DLFY
LXFY
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
GND
1
2
3
4
5
6
7
8
9
CSP
CSN
SEQ
REF
CS
5
10
12
13
14
11
1
2
3
4
5
6
7
8
9
RUN/STOP
Symbol
RESET
BSTFY
COMP
PGND
DHFY
SSOP-28
FBFY
LXFY
DLFY
Top View
BST
BST
CSN
GND
SEQ
CSP
REF
CS
DH
DH
LX
DL
FB
DL
LX
V
V
IN
L
5
3
5
5
5
3
5
3
5
3
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Open drain NMOS output active-low timed reset output. RESET swings GND to V
cycle delay following proper power-up of all supply outputs indicating Power_Good.
Feedback for flyback converter. Normally connected to an external resistor divider used to set the flyback output voltage.
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.
Flyback compensation connection, if required.
Analog ground.
3.3-V internal reference.
Triple controller ON/OFF control. Logic threshold is 0.8 to 2.4 V. When RUN/STOP is low, all converters are off and supply
current is 25-mA typical, 60-mA maximum.
Pin Strap input that selects SMPS power-up sequence (pin should be fixed to GND, REF or V
Current sense input for 5-V buck controller.
Gate-drive output for 5-V buck high-side MOSFET.
Inductor connection for buck 5-V.
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.
CS
FB
DH
LX
BST
DL
V
V
FB
PGND
DL
BST
LX
DH
IN
L
3
3
3
5
5
5
3
3
5
3
5
SEQ = GND: 5-V then 3.3-V then adjustable 5- to 12-V output
SEQ = V
SEQ = REF: 3.3-V then 5-V then adjustable 5- to 12-V output, high impedance error detect mode.
L
: 3.3-V then 5-V then adjustable 5- to 12-V output
Si9137LG
Si9137LG-T1
Part Number
Evaluation Board
Si9137DB
Si9137LG-T1—E3
Lead (Pb)-Free
Part Number
ORDERING INFORMATION
Description
Temperature Range
0 to 90_C
Temperature
0 to 90_C
0 to 90_C
Range
L
. Goes high after a fixed 32,000 clock
L
):
S-40808—Rev. C, 26-Apr-04
Document Number: 70874
Board Type
3 3 V 5 V 5 to ADJ V
3.3 V, 5 V, 5 to ADJ V
Surface Mount
V
OUT