MAX1952ESA 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1952ESA

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators

Maxim Integrated 

1MHz, All-Ceramic, 2.6V to 5.5V Input,

2A PWM Step-Down DC-to-DC Regulators

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VCC = 3.3V, PGND = GND, FB in regulation, CREF = 0.1µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)

PARAMETER

CONDITIONS

MIN

COMP

COMP Transconductance

From FB to COMP, VCOMP = 1.25V

MAX1951

MAX1952

40

26.7

COMP Clamp Voltage, Low

COMP Clamp Voltage, High

VIN = 2.6V to 5.5V, VFB = 1.3V

VIN = 2.6V to 5.5V, VFB = 1.1V

0.6

1.97

COMP Shutdown Resistance From COMP to GND, VIN = 2V

COMP Shutdown Threshold When LX starts/stops switching

COMP rising

COMP falling

0.17

COMP Startup Current

COMP = GND

14

FB

TYP

MAX

80

53.3

1.2

2.28

30

1.2

40

Output Voltage Range

(MAX1951)

When using external feedback resistors to drive FB

0.8

VIN

FB Regulation Voltage

(Error Amp Only)

FB Input Resistance

FB Input Bias Current

LX (Note 4)

LX On-Resistance, PMOS

LX On-Resistance, NMOS

LX Current Sense

LX Current-Limit Threshold

LX Leakage Current

LX Switching Frequency

LX Maximum Duty Cycle

VCOMP = 1V to 2V, VIN = 2.6V to 5.5V

From FB to GND

MAX1951

MAX1952

MAX1952

MAX1951

From LX to COMP, VIN = 2.6V to 5.5V

Duty cycle = 100%, VIN = 2.6V to 5.5V, high side

VIN = 5.5V

VLX = 5.5V

LX = GND

VIN = 2.6V to 5.5V

VCOMP = 1.5V, LX = Hi-Z, VIN = 2.6V to 5.5V

0.783

1.764

10

-0.1

0.16

2.4

-10

0.8

100

0.807

1.836

30

+0.1

266

206

0.35

4.5

10

1.1

Note 3: Specifications to -40°C are guaranteed by design and not production tested.

Note 4: The LX output is designed to provide 2.4A RMS current.

UNITS

µS

V

V

Ω

V

µA

V

V

kΩ

µA

mΩ

mΩ

Ω

A

µA

MHz

%

4 _______________________________________________________________________________________

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