SC1155(2000) データシートの表示（PDF） - Semtech Corporation

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SC1155
(Rev.:2000)

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

Semtech Corporation 

PROGRAMMABLE SYNCHRONOUS

DC/DC HYSTERETIC CONTROLLER

WITH VRM 9.0 VID RANGE

SC1155

PRELIMINARY - August 7, 2000

ELECTRICAL CHARACTERISTICS (cont.)

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

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

HYSTERETIC COMPARATOR

Input Offset Voltage

Input Bias Current

Hysteresis Accuracy

Hysteresis Setting

DROOP COMPENSATION

VosHYSCMP VDROOP pin grounded

IbiasHYSCMP

VHYS_ACC

VHYS_SET

5 mV

1 µA

7 mV

60 mV

Initial Accuracy

OVERCURRENT PROTECTION

VDROOP_ACC VDROOP = 50mV

5 mV

OCP Trip Point

Input Bias Current

HIGH-SIDE VDS SENSING

VOCP

IbiasOCP

0.09 0.1 0.11 V

100 nA

Gain

2

V/V

Initial Accuracy

IOUT Source

IOUT Sink Current

IOUT Voltage Swing

VIOUT Voltage Swing

VIOUT Voltage Swing

LOSENSE High Level Input Voltage

LOSENSE Low Level Input Voltage

Sample/Hold Resistance

BUFFERED REFERENCE

VIOUT_ACC VHISENSE = 12V, VIOUTLO = 11.9V

6 mV

IsourceIOUT VIOUT = 0.5V, VHISENSE = 12V,

500

µA

VIOUTLO = 11.5V

IsinkIOUT VIOUT = 0.05V, VHISENSE = 12V,

40 50

µA

VIOUTLO = 12V

VIOUT (IN)

VHISENSE = 11V,

RIOUT = 10k0hm

0

3.75 V

VIOUT(4,5V)

VHISENSE = 4.5V,

RIOUT = 10kOhm

0

2.0 V

VIOUT(3V) VHISENSE = 3V, RIOUT = 10kOhm

0

1.0 V

VihLOSENSE VHISENSE = 4.5V (Note 1)

2.85

V

VilLOSENSE VHISENSE = 4.5V (Note 1)

1.8 V

RS/H

4.5V ≤ = 13V

50 65 80

Ω

VREFB Load Regulation

DEADTIME CIRCUIT

VldregREFB 10µA < IREFB < 500µA

2

mV

LOHIB High Level Voltage

LOHIB Low Level Input Voltage

LOWDR High Level Input Voltage

LOWDR Low Level Input Voltage

VihLOHIB

VilLOHIB

VihLOWDR

VilLOWDR

(Note 1)

(Note 1)

2

V

1.0 V

2

V

1.0 V

5

© 2000 SEMTECH CORP.

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