SI9137LG-T1-E3 Vishay, SI9137LG-T1-E3 Datasheet - Page 11

• Manufacturer Part Number: SI9137LG-T1-E3
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,BICMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Vishay

Specifications of SI9137LG-T1-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

Document Number: 70874
S-40808—Rev. C, 26-Apr-04
DETAILED FUNCTIONAL BLOCK DIAGRAMS
SLC
COMP
REF
V
CSN
CSP
REF
Soft-Start
−
+
20 mV
V
Error
Amplifier
t
−
+
−
+
FIGURE 6. Buck-Boost Block Diagram (5- to 12-V Adjustable Controller)
Error
Amplifier
C/S
Amplifier
Soft-Start
100 mV
−
+
PWMCMP
Pulse
Skipping
Control
Current
Limit
SYNC
Rectifier Control
FIGURE 5. Buck Block Diagram (3.3-V and 5-Controllers)
t
−
+
−
+
PWM
Comparator
Pulse
Skipping
Control
Current Limit
SEQ
Control
Logic
RUN/STOP
SEQ
Control
Logic
RUN/STOP
1X
_
+
BBM
DH
DL
LX_
V
BST_
L
DH
DL
BSTFY
LXFY
CS_
FB_
DH
DL
FB
5
Vishay Siliconix
R
R
FBFY
X
Y
DHFY
DLFY
R
R
Internal voltage divider is
only used on 5-V output.
2
3
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Si9137
11