SC453 Просмотр технического описания (PDF) - Semtech Corporation

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SC453

Portable, VID Programmed Single Phase Power Supply Controller

Semtech Corporation 

SC453

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Parameter

Symbol

Conditions

VCCA Operating Current

ICC

Under-Voltage Lockout Circuits (VCCA, V5)

Threshold (VCCA falling)

VHCCA

VCCA Hysteresis

VHYST CCA

Threshold (V5 falling)

VHV5

V5 Hysteresis

VHYST V5

Fixed Over-Voltage Protection (CORE)

Threshold

(CORE Rising)

Enable Input (EN)

VTH CORE

FIXED

Input High

ViH (EN)

Input Low

ViL (EN)

VCORE Power Good Generator (PG_DEL, PG#)

Core Input Threshold

VTH CORE

VDAC = 0.6 - 1.75V

Note: during

UVLO, the

output level of

this signal is

undefined

Upper Threshold

Lower Threshold

Hysteresis

Min

3.47

3.85

1.95

2

1.1×

VDAC

0.86×

VDAC

PG# Output Voltage

PG_DEL

Output Voltage

PG_DEL Delay

(at start-up)

VPG#

VPG_DEL

Pulled up with

external 680Ω

resistor to

VPULL-UP

VCORE = VDAC

Either VCORE < 0.88*VDAC,

or, VCORE > 1.12*VDAC

EN is low or EN is high

but UVLO condition

VCORE = VDAC pulled-up with external

680Ω resistor to VPULL-UP 1.2V

Either VCORE < 0.88*VDAC,

or, VCORE > 1.12*VDAC

EN is low or EN is high

but UVLO condition

0.95×

VPULL-UP

0.95×

VPULL-UP

0.95×

VPULL-UP

Measured from PG# assertion

Typ

5

3.70

190

4.00

210

2.00

1

1007

Max Units

mA

3.93

V

mV

4.25

V

mV

2.05

V

V

0.8

V

1.15×

VDAC

V

0.9×

VDAC

%

0.4

V

0.4

V

0.8

Clocks

© 2006 Semtech Corp.

4

www.semtech.com

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