CS5156GDR16 View Datasheet(PDF) - Cherry semiconductor

Part Name

Description

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CS5156GDR16

CPU 5-Bit Nonsynchronous Buck Controller

Cherry semiconductor 

PACKAGE PIN #

16L SO Narrow & PDIP

11

12

13

14

15

16

Package Pin Description: continued

PIN SYMBOL

FUNCTION

PGnd

NC

VCC1

LGnd

COMP

VFB

High current ground for the IC. The MOSFET driver is referenced to

this pin. Input capacitor ground and the anode of the Schottky diode

should be tied to this pin.

No connection.

Input power for the IC.

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.

Block Diagram

VCC1

SS

VID0

VID1

VID2

VID3

VID4

VFB

COMP

VFFB

LGnd

VCC1 Monitor

Comparator

-

+

3.90V

3.85V

5V

60µA

2µA

5 BIT

DAC

Error

+ Amplifier

-

Slow Feedback

PWM

Comparator

-

+

Fast Feedback

-

+

VFFB Low

1V

Comparator

PWM

COMP

2.5V

SS Low

- Comparator

+

0.7V

SS High

+ Comparator

-

FAULT

R

Q

S

Q FAULT

FAULT

Latch

Maximum

On-Time

Timeout

Normal

Off-Time

Timeout

Extended

Off-Time

Timeout

R

Q

S

Q

PWM

Latch

Off-Time

Timeout

GATE = ON

GATE = OFF

COFF

One Shot

R

S

Q

Time Out

Timer

(30µs)

Edge Triggered

VCC2

VGATE

PGnd

COFF

5

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