TLE4253 데이터 시트보기 (PDF) - Infineon Technologies

부품명

상세내역

일치하는 목록

TLE4253

Low Dropout Voltage Tracking Regulator

Infineon Technologies 

TLE4253

Electrical Characteristics

5.3

Adjust / Enable Input

In order to reduce the quiescent current to a minimum, the TLE4253 can be switched to stand-by mode by setting

the adjust/enable input “ADJ/EN” to “low”.

In case the pin “ADJ/EN is left open, an internal pull-down resistor keeps the voltage at the pin low and therefore

ensures that the regulator is switched off.

Table 3 Electrical Characteristics Adjust / Enable

VI = 13.5 V; VADJ/EN ≥ 2.0 V; VFB = VQ; -40 °C ≤ Tj ≤ 150 °C;

all voltages with respect to ground (unless otherwise specified).

Pos. Parameter

Symbol

Limit Values

Min. Typ. Max.

5.3.1 Adjust / Enable

Low Signal Valid

VADJ/EN,low

–

–

0.4

5.3.2

5.3.3

5.3.4

Adjust / Enable

High Signal Valid

(Tracking Region)

Adjust / Enable

Input Current

Adjust / Enable

internal pull-down resistor

V 2 ADJ/EN,high

IADJ/EN

–

RADJ/EN

1

–

–

3.8 5.5

1.5 2

Unit

V

V

µA

MΩ

Test Condition

VQ = 0 V;

II < 2 µA;

Tj ≤ 85 °C

VQ settled:

|VQ - VADJ/EN| < 10 mV;

IQ = 10 mA

VADJ/EN = 5 V;

Typical Performance Characteristics Tracking Regulator

VADJ/EN = 5 V; VFB = VQ (unless otherwise noted)

Startup Sequence

4253_startup.vsd

V [V]

Overshoot depends on

load current, CQ , ESR (CQ )

4

V

ADJ

3

2

1

d VQ / dt =

( IQ,max-ILoad ) / CQ

0 20 40 60 80 100 120 140

t [µs]

Data Sheet

15

Rev. 1.2, 2009-11-09

Share Link: