LT3150 データシートの表示（PDF） - Linear Technology

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LT3150

Fast Transient Response, Low Input Voltage, Very Low Dropout Linear Regulator Controller

Linear Technology 

LT3150

BLOCK DIAGRA S

Boost Switching Regulator

VIN1 3

R5

40k

VIN2

R1

(EXTERNAL)

FB1

Q1

FB1 16

R2

(EXTERNAL)

GND

15

VIN1

R6

40k

gm = 77µmhos

+

– COMPARATOR

A1

–

Q2

x10

R3

RC

100k

RAMP

GENERATOR

Σ

A2

+

CC

40pF

FF

R

Q

S

30k

1.4MHz

R4

OSCILLATOR

140k

SHDN1

14

SHUTDOWN

1 SW

DRIVER

Q3

ILIM1

0.15Ω

2 SWGND

3150 BD1

I1

15µA

SW1

NORMALLY

SHDN2

OPEN

4

I2

5µA

SW2

NORMALLY

CLOSED

VIN2

5

GND

VOUT

6

R7

(EXTERNAL)

FB2

FB2 8

R8

(EXTERNAL)

START-UP

Linear Regulator Controller

OR1

R10

5k Q9

OR2

+

COMP1

–

100mV

HYSTERESIS

VREF

1.21V

I3

100µA

Q4

R9

50k

VTH1

50mV

IPOS

13

ILIM2 AMP

INEG

D1

12

D2

COMP2

COMP3

VTH2

1V

+

ERROR AMP

–

Q7

Q5

Q6

GATE

11

COMP

9

Q8

3150 BD02

3150f

8

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