LP5990 datasheet(5/18 Pages) TI1

5 / 18 page

LP5990

www.ti.com

SNVS438B – APRIL 2007 – REVISED DECEMBER 2007

Electrical Characteristics (continued).

Limits in standard typeface are for TA = 25°C. Limits in boldface type apply over the full operating junction temperature range

(-40°C

≤ TJ ≤ +125°C). Unless otherwise noted, specifications apply to the LP5990 Typical Application Circuit (pg. 1) with: VIN

= VOUT (NOM) + 1.0V, or 2.2V, whichever is higher. VEN = 1.0V, CIN = COUT = 1.0 μF, IOUT = 1.0 mA.

(1), (2)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Enable Input Thresholds

VIL

Low Input Threshold (VEN)

VIN = 2.2V to 5.5V

0.35

VIH

High Input Threshold (VEN)

VIN = 2.2V to 5.5V

1.0

IEN

Input Current at VEN Pin

VEN = 5.5V and VIN = 5.5V

μA

(3)

VEN = 0.0V and VIN = 5.5V

0.001

Transient Characteristics

ΔVOUT

Line Transient

Trise = Tfall = 30μs. ΔVIN = 600 mV

(4)

Load Transient

IOUT = 1 mA to 200 mA in 1 μs

–50

(4)

IOUT = 200 mA to 1 mA in 1 μs

TON

Turn on Time

To 98% of VOUT(NOM)

μs

TOFF

Turn off Time from Enable

100mV of V OUT(NOM)I OUT= 0mA

500

μs

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the

most likely norm.

(3)

There is a 3 M

Ω resistor between VEN and ground on the device.

(4)

This specification is guaranteed by design.

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