CS5150 View Datasheet(PDF) - Cherry semiconductor

Part Name

Description

View to exact match

CS5150

CPU 4-Bit Synchronous Buck Controller

Cherry semiconductor 

Electrical Characteristics: 0°C < TA < +70°C; 0°C < TJ < +85°C; 8V < VCC1 < 14V; 5V < VCC2 < 14V; DAC Code: VID2 = VID1 =

VID0 = 1; VID3 = 0; CVGATE(L) and CVGATE(H) = 1nF; COFF = 330pF; CSS = 0.1µF, unless otherwise specified.

PARAMETER

s Time Out Timer

Time Out Time

Fault Mode Duty Cycle

TEST CONDITIONS

MIN

VFB = VCOMP; VFFB = 2V;

10

Record VGATE(H) Pulse High Duration

VFFB = 0V

35

TYP

30

50

MAX

50

65

UNIT

µs

%

Note 1: Guaranteed by design, not 100% tested in production.

PACKAGE PIN #

16L SO Narrow & PDIP

1,2,3,4

5

6

7

8

9

10

11

12

13

14

15

16

PIN SYMBOL

VID0 – VID3

SS

NC

COFF

VFFB

VCC2

VGATE(H)

PGnd

VGATE(L)

VCC1

LGnd

COMP

VFB

Package Pin Description

FUNCTION

Voltage ID DAC input pins. These pins are internally pulled up to 5V

providing logic ones if left open. The DAC range is 2.14V to 3.54V with

100mV increments. VID0 - VID3 select the desired DAC output voltage.

Leaving all 4 DAC input pins open results in a DAC output voltage of

1.244V, allowing for adjustable output voltage, using a traditional resis-

tor divider.

Soft Start Pin. A capacitor from this pin to LGnd in conjunction with

internal 60µA current source provides soft start function for the con-

troller. This pin disables fault detect function during Soft Start. When a

fault is detected, the soft start capacitor is slowly discharged by internal

2µA current source setting the time out before trying to restart the IC.

Charge/discharge current ratio of 30 sets the duty cycle for the IC when

the regulator output is shorted.

No connection.

A capacitor from this pin to ground sets the time duration for the on

board one shot, which is used for the constant off time architecture.

Fast feedback connection to the PWM comparator. This pin is connected

to the regulator output. The inner feedback loop terminates on time.

Boosted power for the high side gate driver.

High FET driver pin capable of 1.5A peak switching current. Internal cir-

cuit prevents VGATE(H) and VGATE(L) from being in high state simultane-

ously.

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 pro-

vided 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.

4

Share Link: