MAX1733 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1733

Low-Voltage, Step-Down DC-DC Converters in SOT23

Maxim Integrated 

Low-Voltage, Step-Down DC-DC Converters

in SOT23

Typical Operating Characteristics (continued)

(CIN = 2.2µF ceramic, COUT = 22µF tantalum, L = 10µH, unless otherwise noted.)

SOFT-START AND SHUTDOWN RESPONSE

MAX1733/4-09

VIN = 3.6V, VOUT = 1.8V, RLOAD = 7Ω

VOUT

1V/div

IIN

100mA/div

200µs/div

VSHDN

5V/div

LOAD-TRANSIENT RESPONSE

MAX1733/4-12

VIN = 3.6V, VOUT = 1.8V, ILOAD = 20mA TO 200mA

VOUT

AC-COUPLED

50mV/div

ILOAD

100mA/div

4µs/div

LIGHT-LOAD LINE-TRANSIENT RESPONSE

MAX1733/4-10

VIN = 3.4V TO 3.8V, VOUT = 1.8V, ILOAD = 20mA

VOUT

AC-COUPLED

50mV/div

HEAVY-LOAD LINE-TRANSIENT RESPONSE

MAX1733/4-11

VIN = 3.4V TO 3.8V, VOUT = 1.8V, ILOAD = 200mA

VOUT

AC-COUPLED

50mV/div

4µs/div

VIN

AC-COUPLED

200mV/div

4µs/div

VIN

AC-COUPLED

200mV/div

Pin Description

PIN

NAME

FUNCTION

1

IN

Supply Voltage Input. Input range from +2.7V to +5.5V. Bypass with a 2.2µF ceramic capacitor to

GND.

2

GND

Ground

3

SHDN

Active-Low Shutdown Input. Connect SHDN to IN for normal operation. In shutdown, LX becomes

high impedance and quiescent current drops to 0.01µA.

4

FB

MAX1733 Voltage Feedback Input. FB regulates to 1.25V nominal. Connect FB to an external

voltage-divider between the output voltage and GND.

OUT

MAX1734 Voltage Sense Input. OUT is connected to an internal voltage-divider.

5

LX

Inductor Connection

_______________________________________________________________________________________ 5

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