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CS51312GDR16

Synchronous CPU Buck Controller for 12V Only Applications

Cherry semiconductor 

Electrical Characteristics: 0˚C < TA < 70˚C; 0˚C < TJ < 125˚C; 9V < VCC1 < 14V; 9V ≤ VCC2 ≤ 20V;

2.0V DAC Code(VID4 = VID3 =VID2 = VID1 = 0, VID0 = 1), CGATE(H) = CGATE(L) = 3.3nF, COFF = 390pF; Unless otherwise stated.

PARAMETER

TEST CONDITIONS

s General Electrical Specifications

VCC1 Monitor Start Threshold

VCC1 Monitor Stop Threshold

Hysteresis

Start - Stop

VCC1 Supply Current

No Load on GATE(H), GATE(L)

VCC2 Supply Current

No Load on GATE(H), GATE(L)

MIN

7.9

7.6

0.15

TYP

8.4

8.1

0.30

9.5

2.5

MAX

8.9

8.6

0.60

16

4.5

UNIT

V

V

V

mA

mA

Note 1: The IC power dissipation in a typical application with VCC = 12V, switching frequency fSW = 250kHz, 50nc

MOSFETs and RθJA = 115°C/W yields an operating junction temperature rise of approximately 52°C, and a junction tem-

perature of 77°C with an ambient temperature of 25°C.

Note 2: Guaranteed by design, not 100% tested in production.

Block Diagram

VOUT

VID0

VID1

VID2

VID3

VID4

VFB

1.1V

-

COMP

EA

PWM COMP

+

-

CURRENT LIMIT

86mV

+

-

-

DISCHARGE

COMP

R

+- 0.25V

Q

FAULT

LATCH

S

COFF

OFF

TIME

DAC

UVLO

VCC1

VCC2

GATE(H)

NONOVERLAP

+

LOGIC

-

+

-

VCC1

OVP

PWRGD

5

GATE(L)

Gnd

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