SC1534CSTR datasheet(4/7 Pages) SEMTECH

4 / 7 page

652 MITCHELL ROAD NEWBURY PARK CA 91320

400mA SmartLDO

SC1534

PRELIMINARY - July 26, 2000

ELECTRICAL CHARACTERISTICS

Unless specified, T

A = 25°C, VIN = 5V, VAUX = 3.3V, IO = 400mA, CO = 10µF. Values in bold apply over full operating temperature range.

Parameter

Symbol

Test Conditions

MIN

TYP

MAX Units

Drive Output

Drive Voltage

4.35V

≤ VIN ≤ 5.5V, I

DR = 200µA

3.4

VIN - 0.8

3.3

VIN < V

TH(LO), IDR = -200µA

150

250

Peak Drive Current

DR(PK)

Sinking: VIN = 3.9V, V

DR = 1V;

Sourcing: VIN = 4.35V, VIN - V

DR = 2.5V

Drive High Delay

(1)(4)

DR = 1.2nF, VIN ramping up, measured

0.5

1.0

µs

from VIN = V

TH(HI) to VDR = 2V

2.0

Drive Low Delay

(1)(4)

DR = 1.2nF, VIN ramping down, measured

0.5

1.0

µs

from VIN = V

TH(LO) to VDR = 2V

2.0

NOTES:

(1) Guaranteed by design.

(2) See 5V Detect Thresholds on page 5.

(3) Recommended source impedance for 5V supply:

≤ 0.125Ω. This will ensure that I

O x RSOURCE < VHYST, thus

avoiding DR toggling during 5V detect threshold transitions.

(4) See Timing Diagram on page 5.

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