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ML4790CS

Adjustable Output, Low Ripple Boost Regulator

Micro Linear Corporation 

ML4790

ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are those values beyond which

the device could be permanently damaged. Absolute

maximum ratings are stress ratings only and functional

device operation is not implied.

VBOOST ........................................................................ 7V

Voltage on Any Other Pin ... GND –0.3V to VBOOST +0.3V

Peak Switch Current (IPEAK) .......................................... 1A

Average Switch Current (IAVG) ............................... 500mA

LDO Output Current ............................................. 250mA

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

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

Lead Temperature (Soldering 10s) .......................... +260°C

Thermal Resistance (θJA)

Plastic SOIC .................................................... 110°C/W

OPERATING CONDITIONS

Temperature Range

ML4790CS-X ............................................ 0°C to +70°C

ML4790ES-X ......................................... –20°C to +70°C

VIN Range

ML4790CS-X ................................................ 1.0V to 6V

ML4790ES-X ................................................. 1.1V to 6V

VOUT Range .................................................. 2.5V to 5.5V

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, VIN = Operating Voltage Range, TA = Operating Temperature Range. (Note 1)

PARAMETER

Supply

VIN Current

VOUT Quiescent Current

VL Quiescent Current

PFM Regulator

Pulse Width (TON)

LDO

SENSE Comparator Threshold Voltage

Load Regulation

Dropout Voltage

Output Ripple

Shutdown

SHDN Threshold

SHDN Bias Current

CONDITIONS

VIN = 6V

SHDN = high

VBOOST = VOUT + 0.5V

See Figure 1

VIN = 1.2V, IOUT < 10mA

VIN = 2.4V, IOUT < 75mA

See Figure 1

VIN = 1.2V, IOUT < 10mA

VIN = 2.4V, IOUT < 75mA

MIN

TYP.

MAX

UNITS

60

75

µA

15

25

µA

8

10

µA

1

µA

4.5

5

5.5

µs

194

200

206

mV

4.85

5.0

5.15

V

4.85

5.0

5.15

V

300

mV

500

mV

5

mVP-P

0.5

0.8

1.0

V

–100

100

nA

Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.

22µH

(Sumida CD54)

ML4790

VIN

100µF

1nF

931kΩ

39.2kΩ

VIN PWR GND

GND

SHDN

SENSE

VOUT

VL

VBOOST

IOUT

100µF

VOUT

33µF

Figure 1. Application Test Circuit

3

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