MAX1953EUB Ver la hoja de datos (PDF) - Maxim Integrated

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MAX1953EUB

Low-Cost, High-Frequency, Current-Mode PWM Buck Controller

Maxim Integrated 

Low-Cost, High-Frequency, Current-Mode PWM

Buck Controller

ABSOLUTE MAXIMUM RATINGS

IN, FB to GND...........................................................-0.3V to +6V

LX to BST..................................................................-6V to +0.3V

BST to GND ............................................................-0.3V to +20V

DH to LX ....................................................-0.3V to (VBST + 0.3V)

DL, COMP to GND.......................................-0.3V to (VIN + 0.3V)

HSD, ILIM, REFIN to GND ........................................-0.3V to 14V

PGND to GND .......................................................-0.3V to +0.3V

IDH, IDL ................................................................±100mA (RMS)

Continuous Power Dissipation (TA = +70°C)

(derate 5.6mW/°C above +70°C) ..................................444mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VIN = 5V, VBST - VLX = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

CONDITIONS

Operating Input Voltage Range

HSD Voltage Range

MAX1954 only (Note 2)

Quiescent Supply Current

VFB = 1.5V, no switching

Standby Supply Current (MAX1953/ MAX1957) VIN = VBST = 5.5V, COMP = GND

Standby Supply Current (MAX1954)

VIN = VBST = 5.5V, VHSD = 13.2V,

COMP = GND

Undervoltage Lockout Trip Level

Rising and falling VIN, 3% hysteresis

Output Voltage Adjust Range (VOUT)

ERROR AMPLIFIER

FB Regulation Voltage

TA = 0°C to +85°C (MAX1953/MAX1954)

TA = -40°C to +85°C (MAX1953/MAX1954)

MAX1957 only

Transconductance

FB Input Leakage Current

REFIN Input Bias Current

FB Input Common-Mode Range

REFIN Input Common-Mode Range

Current-Sense Amplifier Voltage Gain Low

Current-Sense Amplifier Voltage Gain

VFB = 0.9V

VREFIN = 0.8V, MAX1957 only

MAX1957 only

ILIM = GND (MAX1953 only)

VILIM = VIN or ILIM = open (MAX1953 only)

MAX1954/MAX1957

MIN TYP MAX UNITS

3.0

5.5

V

3.0

13.2

V

1

2

mA

220 350

µA

220 350

µA

2.50 2.78 2.95

V

0.8

0.86 x

VIN

V

0.788 0.8 0.812

0.776 0.8 0.812

V

VREFIN

- 8mV

VREFIN

VREFIN

+ 8mV

70

110 160

µS

5

500

nA

5

500

nA

-0.1

1.5

V

-0.1

1.5

V

5.67

6.3

6.93

V/V

3.15

3.5

3.85

V/V

2 _______________________________________________________________________________________

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