SC1155 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC1155

PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE

Semtech Corporation 

SC1155

POWER MANAGEMENT

DC Electrical Characteristics (Cont.)

Unless specified: 0 < TJ < 125°C, VIN = 12V

Parameter

Symbols Conditions

Reference/Voltage Identification

Reference Voltage Accuracy

VREF 11.4V < VIN12V< 12.6V, over full

VID range (see Output Voltage

Table)

VIDO - VID4 High Threshold

Voltage

VTH(H)

VIDO - VID4 Low Threshold Voltage

Power Good

VTH(L)

Undervoltage Threshold

Output Saturation Voltage

Hysteresis

Over Voltage Protection

VTH(PWRGD)

VSAT

IO = 5mA

VHYS(PWRGD)

OVP Trip Point

Soft Start

VOVP

Charge Current

Discharge Current

ICHG

Idischg

VSS = 0.5V, resistance from VREFB

pin to AGND = 20kΩ, VREFB = 1.3V

Note: ICHG = (IVREFB / 5)

V(SS) = 1V

PRELIMINARY

Min Typ Max Units

-1

1

%

2.25

V

1

V

90

95 %VREF

0.5

V

10

mV

2.08 2.15 2.22 V

10.4 13 15.6 µA

1

mA

Inhibit Comparator

Start Threshold

VIN 12V UVLO

Start Threshold

Hysteresis

Hysteretic Comparator

Input Offset Voltage

Input Bias Current

Hysteresis Accuracy

Hysteresis Setting

Vstart(NH)

VstartUVLO

VhysUVLO

VosHYSCMP VDROOP pin grounded

IbiasHYSCM-

P

VHYS ACC

VHYS SET

1 2.0 2.4

V

9.25 10.25 11.25 V

1.8

2

2.2

V

5

mV

1

uA

7

mV

60 mV

 2001 Semtech Corp.

3

www.semtech.com

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