7

LTC1574

LTC1574-3.3/LTC1574-5

Low Dropout 5V Step-Down Regulator with Low-Battery Detection

Positive to –5V Converter

High Efficiency 3.3V Regulator

5

2, 4, 13, 15

6

11

12

7

10

3, 14

L1

100

0.1

µF

47

µF**

16V

× 2

1574 TA04

5V

365mA

*LOW-

BATTERY

INDICATOR

4.7k

162k

47.5k

5.5V to 12.5V

GND

LTC1574-5

SHDN

SW

+

47

µF**

16V

× 2

+

* LOW-BATTERY INDICATOR IS

** AVX TPSD476K016

MANUFACTURER

PART NO.

TYPE

COILTRONICS

CTX100-4

SURFACE MOUNT

SUMIDA

CD75-101

SURFACE MOUNT

GOWANDA

GA10-103K

THROUGH HOLE

5

2, 4, 13, 15

6

11

12

7

10

3, 14

50

µH

0.1

µF

1574 TA06

–5V

*LOW-

BATTERY

INDICATOR

4.7k

280k

43k

4V TO 12.5V

GND

LTC1574-5

SHDN

SW

+

100

µF***

10V

+

* LOW-BATTERY INDICATOR IS

** AVX TPSD106K035

*** AVX TPSD107K010

MANUFACTURER PART NO.

TYPE

COILTRONICS

CTX50-3

SURFACE MOUNT

COILCRAFT

DT3316-473 SURFACE MOUNT

SUMIDA

CD54-470

SURFACE MOUNT

GOWANDA

GA10-472K THROUGH HOLE

10

µF**

35V

× 2

4

110

6

140

8

170

10

200

12.5

235

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

5

2, 4, 13, 15

6

12

11

7

10

3, 14

50

0.1

µF

22

µF*

25V

× 2

1574 TA05

3.3V

425mA

4V TO 12.5V

GND

LTC1574-3.3

SHDN

SW

* AVX TPSD226K025

** AVX TPSD476K016

+

47

µF*

16V

× 2

+