CS5158 Cherry Semiconductor Corporation, CS5158 Datasheet - Page 5

• Manufacturer Part Number: CS5158
• Description: CPU 5-Bit Synchronous Buck Controller
• Manufacturer: Cherry Semiconductor Corporation

COMP
V
LGnd
V
CC1
V
V
V
V
V
V
FFB
SS
ID0
ID1
ID2
ID3
ID4
FB
16L SO Narrow
PACKAGE PIN #
Slow Feedback
Fast Feedback
11
12
13
14
15
16
3.90V
3.85V
+
5 BIT
DAC
-
V
Comparator
CC1
Monitor
+
-
Error
Amplifier
1V
PIN SYMBOL
V
COMP
PGnd
LGnd
GATE(L)
V
V
CC1
PWM
Comparator
FB
+
+
-
-
V
Comparator
60µA
FFB
2µA
PWM
COMP
Low
Package Pin Description: continued
5V
High current ground for the IC. The MOSFET drivers are referenced to
this pin. Input capacitor ground and the source of lower FET should be
tied to this pin.
Low FET driver pin capable of 1.5A peak switching current.
Input power for the IC and low side gate driver.
Signal ground for the IC. All control circuits are referenced to this pin.
Error amplifier compensation pin. A capacitor to ground should be
provided externally to compensate the amplifier.
Error amplifier DC feedback input. This is the master voltage feedback
which sets the output voltage. This pin can be connected directly to the
output or a remote sense trace.
2.5V
Block Diagram
0.7V
Maximum
Extended
On-Time
Off-Time
Off-Time
Timeout
Timeout
Timeout
Normal
5
+
-
+
-
SS High
Comparator
SS Low
Comparator
Time Out
(30µs)
Timer
FUNCTION
R
S
Off-Time
Timeout
FAULT
Latch
Q
Q
R
S
FAULT
FAULT
PWM
Latch
Edge Triggered
Q
Q
R
S
GATE(H) = OFF
One Shot
GATE(H) = ON
C
OFF
Q
V
CC1
PGnd
V
V
PGnd
V
C
GATE(L)
GATE(H)
CC2
OFF