SC120(2009) Просмотр технического описания (PDF) - Semtech Corporation

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производитель

SC120
(Rev.:2009)

Low Voltage Synchronous Boost Converter

Semtech Corporation 

SC120

Typical Characteristics (continued)

VOUT = 3.3V

0.6

IOUT (max) vs. VIN

0.5

T = 25°C

0.4

T = 85°C

0.3

T = -40°C

0.2

Minimum Start-up Voltage vs. Temperature

VOUT = 3.3V, IOUT = 1mA

0.9

0.85

0.8

0.75

0.7

0.1

0

0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5

L Input Voltage (V)

IA Load Transient (PSAVE to PWM)

V = 3.3V, V = 1.2V, T = 25°C

OUT

IN

A

T I = 5mA to

N OUT

100mA

E (50mA/div)

V

ID OUT

(100mV/div)

AC Coupled

NF Time = (100μs/div)

CO PSAVE Operation

0.65

0.6

-40

-20

0

20

40

60

80

Temperature (°C)

Load Transient (PWM to PWM)

V = 3.3V, V = 1.5V, T =25°C

OUT

IN

A

I = 40mA to

OUT

140mA

(50mA/div)

V

OUT

(100mV/div)

AC Coupled

Time = (100μs/div)

PWM Operation

100

V = 3.3V, V = 1.5V, I = 20mA

OUT

IN

OUT

V ripple

OUT

(50mV/div)

VOUT = 3.3V, VIN = 1.5V, IOUT = 50mA

V ripple

OUT

(10mV/div)

I

L

(100mA/div)

V

LX

(5V/div)

Time = (10μs/div)

I

L

(100mA/div)

VLX

(5V/div)

Time = (400ns/div)

PRELIMINARY

10

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