LTC1438CG(RevA) View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1438CG
(Rev.:RevA)

Dual High Efficiency, Low Noise, Synchronous Step-Down Switching Regulators

Linear Technology 

LTC1438/LTC1439

ABSOLUTE MAXIMUM RATINGS

Input Supply Voltage (VIN)....................... 36V to – 0.3V

Topside Driver Voltage (BOOST 1, 2) ...... 42V to – 0.3V

Switch Voltage (SW1, 2)...................... VIN + 5V to – 5V

EXTVCC Voltage....................................... 10V to – 0.3V

POR2, LBO Voltages ............................... 12V to – 0.3V

AUXFB Voltage ....................................... 20V to – 0.3V

AUXDR Voltage ....................................... 28V to – 0.3V

SENSE+ 1, SENSE+ 2, SENSE– 1, SENSE– 2,

VOSENSE2 Voltages ................... INTVCC + 0.3V to – 0.3V

VPROG1, VPROG2 Voltages ................... INTVCC to – 0.3V

PLL LPF, ITH1, ITH2 Voltages .................. 2.7V to – 0.3V

AUXON, PLLIN, SFB1,

RUN/SS1, RUN/SS2, LBI Voltages ......... 10V to – 0.3V

Peak Output Current < 10µs (TGL1, 2, BG1, 2) ......... 2A

Peak Output Current < 10µs (TGS1, 2) .............. 250mA

INTVCC Output Current ....................................... 50mA

Operating Ambient Temperature Range

Commercial ........................................... 0°C to 70°C

Industrial .......................................... – 40°C to 85°C

Junction Temperature (Note 1) ............................ 125°C

Storage Temperature Range ................ – 65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

PACKAGE/ORDER INFORMATION

SENSE+ 1 1

SENSE– 1 2

VPROG1* 3

ITH1 4

POR2** 5

COSC 6

SGND 7

LBI 8

LBO 9

SFB1 10

ITH2 11

VOSENSE2 12

SENSE– 2 13

SENSE+ 2 14

TOP VIEW

28 RUN/SS1

27 BOOST 1

26 TGL1

25 SW1

24 VIN

23 BG1

22 INTVCC

21 PGND

20 BG2

19 EXTVCC

18 SW2

17 TGL2

16 BOOST 2

15 RUN/SS2

G PACKAGE

28-LEAD PLASTIC SSOP

*VOSENSE1 ON LTC1438-ADJ

**NC ON THE LTC1438XCG

TJMAX = 125°C, θJA = 95°C/ W

Consult factory for Military grade parts.

ORDER

PART NUMBER

LTC1438CG

LTC1438CG-ADJ

LTC1438IG

LTC1438IG-ADJ

LTC1438XCG

RUN/SS1 1

SENSE+ 1 2

SENSE– 1 3

VPROG1 4

ITH1 5

POR2 6

COSC 7

SGND 8

LBI 9

LBO 10

SFB1 11

ITH2 12

VPROG2 13

VOSENSE2 14

SENSE– 2 15

SENSE+ 2 16

RUN/SS2 17

AUXDR 18

TOP VIEW

36 PLL LPF

35 PLLIN

34 BOOST 1

33 TGL1

32 SW1

31 TGS1

30 VIN

29 BG1

28 INTVCC

27 PGND

26 BG2

25 EXTVCC

24 TGS2

23 SW2

22 TGL2

21 BOOST 2

20 AUXON

19 AUXFB

G PACKAGE

GW PACKAGE

36-LEAD PLASTIC SSOP 36-LEAD PLASTIC SSOP

TJMAX = 125°C, θJA = 95°C/ W (G)

TJMAX = 125°C, θJA = 85°C/ W (GW)

ORDER

PART NUMBER

LTC1439CG

LTC1439IG

LTC1439CGW

LTC1439IGW

2

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