Preliminary

TS4270

5V Ultra Low Dropout Fixed Voltage Regulator

2/9

Version: A07

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Output Voltage

4.90

5

5.10

V

Output Voltage

4.90

5

5.10

V

Output Current Limit

650

850

--

mA

--

1

1.5

mA

--

55

75

mA

--

70

90

mA

Dropout Voltage (Note 1)

--

350

700

mV

Load Regulation

--

25

50

mV

Line Regulation

--

12

25

mV

Power Supply Ripple Rejection

PSRR

--

54

--

dB

Reset Generator

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Switching Threshold

4.5

4.65

4.8

V

Reset High Voltage

4.5

–

–

V

Reset Low Voltage (Note 2)

–

60

–

mV

Reset Low Voltage

–

200

400

mV

Reset Pull-up

R

Internally Connected to Output

18

30

46

kΩ

Lower Reset Timing Threshold

0.2

0.45

0.8

V

Charge Current

8

14

25

uA

Upper Timing Threshold

1.4

1.8

2.3

V

Delay Time

td

–

13

–

ms

Reset Reaction Time

–

–

3

us

Over Voltage Protection

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Turn-off Voltage

42

44

46

V

Note:

at 13.5 V input)

2. Reset peak is always lower than 1.0 V.

Pin Definitions and Functions

Pin

Symbol

Function

1

Input

Block to ground directly on the IC with ceramic capacitor

2

Reset Output

The open collector output is connected to the 5 V output via an integrated resistor of 30 kW

3

GND

Internally connected to heatsink

4

Reset Delay

Connect a capacitor to ground for delay time adjustment

5

Output

5V, block to ground with 22 mF capacitor ESR, < 3W