CS5158GD16 View Datasheet(PDF) - Cherry semiconductor

Part Name

Description

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CS5158GD16

CPU 5-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: VID4 = VID2 = VID1

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

PARAMETER

s PWM Comparator

Transient Response

VFFB Bias Current

TEST CONDITIONS

VFFB = 0 to 5V to VGATE(H) = 9V to 1V;

VCC1 = VCC2 = 12V

VFFB = 0V

MIN

TYP

100

0.3

MAX

125

UNIT

ns

µA

s Supply Current

ICC1 No Switching

ICC2 No Switching

Operating ICC1

Operating ICC2

VFB = COMP = VFFB

VFB = COMP = VFFB

8.5

13.5

mA

1.6

3.0

mA

8

13

mA

2

5

mA

s COFF

Normal Charge Time

Extension Charge Time

Discharge Current

VFFB = 1.5V; VSS = 5V

VSS = VFFB = 0

COFF to 5V; VFB >1V

1.0

1.6

2.2

µs

5.0

8.0

11.0

µs

5.0

mA

s Time Out Timer

Time Out Time

Fault Mode Duty Cycle

VFB = VCOMP; VFFB = 2V;

10

Record VGATE(H) Pulse High Duration

VFFB = 0V

35

30

50

µs

50

65

%

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

PACKAGE PIN #

16L SO Narrow

1,2,3,4,6

5

7

8

9

10

PIN SYMBOL

Package Pin Description

FUNCTION

VID0 – VID4

SS

COFF

VFFB

VCC2

VGATE(H)

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

providing logic ones if left open. VID4 selects the DAC range. When VID4

is High (logic one), the DAC range is 2.10V to 3.50V with 100mV incre-

ments. When VID4 is Low (logic zero), the DAC range is 1.30V to 2.05V

with 50mV increments. VID0 - VID4 select the desired DAC output volt-

age. Leaving all 5 DAC input pins open results in a DAC output voltage

of 1.2440V, allowing for adjustable output voltage, using a traditional

resistor 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.

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.

4

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