MAX762CSA データシートの表示（PDF） - Maxim Integrated

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MAX762CSA

12V/15V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Converters

Maxim Integrated 

12V/15V or Adjustable, High-Efficiency,

Low IQ, Step-Up DC-DC Converters

_____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)

LOAD–TRANSIENT RESPONSE

LINE–TRANSIENT RESPONSE

200mA

6V

A

A

0mA

4V

B

B

5µs/div

A: ILOAD, (0mA to 200mA)

B: VOUT , AC COUPLED, 100mV/div

VIN = 5V, VOUT = 12V

5ms/div

A: VIN (4V to 6V)

B: VOUT, AC COUPLED, 20mV/div

IOUT = 50mA, VOUT = 12V

______________________________________________________________Pin Description

PIN

NAME

FUNCTION

1

LBO

Low-battery output is an open-drain output that goes low when LBI is less than 1.5V.

Connect to V+ through a pull-up resistor. Leave LBO floating if not used.

2

LBI

Input to the internal low-battery comparator. Tie to GND or V+ if not used.

Feedback input. For fixed-output bootstrapped operation, connect FB to GND. For

adjustable-output bootstrapped operation, connect a resistor divider between V+, FB and

3

FB

GND. For non-bootstrapped operation, there is no fixed-output option. Connect a resistor

divider network between VOUT, FB and GND. See Bootstrapped/Non-Bootstrapped

Modes section.

Active-high TTL/CMOS logic-level input. In shutdown mode (SHDN = V+), the internal

4

SHDN

switch is turned off and the output voltage equals V+ minus a diode drop (due to the DC

path from the input to the output). Tie to GND for normal operation.

5

REF

1.5V reference output that can source 100µA for external loads. Bypass with 0.1µF

or larger capacitor.

6

GND

Ground

7

LX

Drain of the internal N-channel FET. LX has an output resistance of 1Ω and a peak current

limit of 1A.

8

V+

Power-supply input. In bootstrapped mode, V+ is also the output voltage sense input.

6 _______________________________________________________________________________________

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