ML4950CS View Datasheet(PDF) - Micro Linear Corporation

Part Name

Description

MFG CO.

ML4950CS

Adjustable Output, Low Current Single Cell Boost Regulator with Detect

Micro Linear Corporation 

1 2 3 4 5 6 7 8 9 10

ML4950

VIN

100µF

27µH

(Sumida CD75)

ML4950

VIN PWR GND

GND

RESET

SENSE

DETECT

VL

VOUT

464kΩ

0.1%

100µF

IOUT

VOUT

40.2kΩ

0.1%

Figure 1. Application Test Circuit.

L1

VIN

6

VL

START-UP

SQ

RQ

Q1

5µs

ONE SHOT

Q2

A2

A1

VREF

VOUT

5

SENSE

3

+

C1 VOUT

–

R1

R2

Figure 2. PFM Regulator Block Diagram.

INDUCTOR

CURRENT

Q(ONE SHOT)

Q2

Q1 ON

ON

Q1 & Q2 OFF

Q2

Q1 ON ON

Figure 3. PFM Inductor Current Waveforms and Timing.

4

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