MAX17761 查看數據表（PDF） - Maxim Integrated

零件编号

产品描述 (功能)

比赛名单

MAX17761

4.5V to 76V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Maxim Integrated 

MAX17761

4.5V to 76V, 1A, High-Efficiency,

Synchronous Step-Down DC-DC Converter

Electrical Characteristics (continued)

(VIN = 24V, VEN/UVLO = unconnected, RRT = 105kΩ (fSW = 400kHz), LX = unconnected, TA = -40°C to +125°C, unless otherwise

noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.) (Note 2)

PARAMETER

MODE

MODE PFM Threshold

SYMBOL

CONDITIONS

Rising

MIN TYP MAX UNITS

1

1.22 1.44

V

Hysteresis

0.19

V

TIMINGS

Minimum On-Time

Maximum Duty Cycle

OSCILLATOR

tON-MIN

DMAX

45

70

110

ns

90

93

97

%

Switching Frequency

Switching Frequency Adjustable

Range

RRT = 210kΩ

fSW

RRT = 140kΩ

RRT = 105kΩ

RRT = 69.8KΩ

180

200

220

kHz

270

300

330

kHz

360

400

440

kHz

540

600

660

kHz

200

600

kHz

SYNC Input Frequency

SYNC Pulse Minimum Off time

1.15 ×

fSW

40

1.4

× fSW

kHz

ns

SYNC High Threshold

Hysteresis

Number of SYNC Pulses to Enable

Synchronization

VSYNC-H

VSYNC-HYS

1

1.22 1.44

V

0.18

V

1

Cycles

RESET

FB Threshold for RESET Rising

FB Threshold for RESET Falling

RESET Delay After FB Reaches

95% Regulation

VFB-OKR

VFB-OKF

VFB rising

VFB falling

95

%

92

%

2.1

ms

RESET Output Level Low

RESET Output Leakage Current

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

Thermal-Shutdown Hysteresis

IRESET = 1mA

VFB = 1.063 × VFB-REG, TA = +25°C

Temperature rising

0.07

V

1

µA

160

°C

20

°C

Note 2: Electrical specifications are production tested at TA = +25°C. Specifications over the entire operating temperature range are

guaranteed by design and characterization.

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