LT1158CS View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LT1158CS

Half Bridge N-Channel Power MOSFET Driver

Linear Technology 

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LT1158

TYPICAL APPLICATIONS

0.01µF

16k

1

8

2

7

LT1431

3

6

4

5

3.3k

1000pF

1

8

2

7

CMOS

24k 3

555

6

4

5

0.33µF

200pF

4.99k

1%

RX

1%

DRIVER SUPPLY 10V TO 15V

(CAN BE POWERED FROM VIN

WITH LOGIC-LEVEL Q1, Q2)

10µF 1

BOOST DR

16

BOOST

2 V+

0.01µF

3

BIAS

15

T GATE DR

14

T GATE FB

SHUTDOWN 4 ENABLE

5

FAULT

13

T SOURCE

LT1158 SENSE+ 12

6 INPUT

470pF 7

GND

SENSE– 11

V+ 10

8

B GATE FB

9

B GATE DR

VIN 4.5V TO 6V

BAS16

0.22µF

500k

+ 220µF

10V

OS-CON × 4

Q1

L1

8µH

SHORT-CIRCUIT

CURRENT = 22A

+ RS –

0.01Ω

EA

Q2

VOUT

15A

330µF

6.3V

AVX × 4

VOUT

2.90V 3.05V 3.30V 3.45V 3.60V

RX (1%) 806Ω 1.10k 1.62k 1.91k 2.21k

Q1, Q2: MTB75N05HD (USE WITH 10V TO 15V DRIVER SUPPLY)

MTB75N03HDL (USE WITH VIN DRIVER SUPLY)

CMOS 555: LMC555 OR TLC555

L1: COILTRONICS CTX02-12171-1

RS: KRL/BANTRY SL-1R010J × 2

Figure 11. 5V to 3.XXV,15A Converter (Uses PC Board Area for Heatsink)

LT1158 F11

8V TO 20V INPUT

100k

VP0300

100k

CMOS

ON/OFF

INSERT FOR

ZERO POWER

SHUTDOWN

2N2222

L1: COILTRONICS

CTX50-5-52

RS: VISHAY/DALE TYPE LVR-3

VISHAY/ULTRONIX RCS01, SM1

ISOTEK CORP. ISA-PLAN SMR

1N4148

×

1 BOOST DR

16

BOOST

2 V+

0.01µF

3

BIAS

15

T GATE DR

14

T GATE FB

+

10µF

4

ENABLE

5

FAULT

13

T SOURCE

LT1158 SENSE+ 12

6 INPUT

SENSE– 11

7

GND

V+ 10

8 B GATE FB

9

B GATE DR

24k

1000pF

0.1µF

100Ω

100Ω

IRFZ34

510k

IRFZ44

+ 500µF

LOW ESR

L1

50µH

+

RS

20mΩ

SHORT-CIRCUIT

CURRENT = 6A

+5V/4A

–

OUTPUT

1000µF

LOW ESR

510Ω

1N4148

0.05µF 1k

1

8

2

7

LT1431

3

6

CONSTANT OFF TIME CURRENT MODE CONTROL LOOP

( ) FREQUENCY

=

1

tOFF

1

–

VOUT

VIN

WHERE tOFF ≈ 10µs

SEE FIGURE 4 FOR EFFICIENCY CURVE

4

5

LT1158 F12

Figure 12. High Efficiency 5V Step-Down Switching Regulator (Requires No Heatsinks)

16

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