ML4851 datasheet(3/9 Pages) MICRO-LINEAR

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ML4851

July 2000

DATASHEET

OPERATING CONDITIONS

Temperature Range

ML4851CS-X .............................................. 0ºC to 70ºC

ML4851ES-X ........................................... –20ºC to 70ºC

VIN Operating Range

ML4851CS-X ................................ 1.0V to VOUT – 0.2V

ML4851ES-X ................................ 1.1V to VOUT – 0.2V

Thermal Resistance (

qJA) .................................... 160ºC/W

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.

VOUT .......................................................................... 7V

Voltage on any other pin ..... GND – 0.3V to VOUT + 0.3V

Peak Switch Current, I(PEAK) ...................................................1A

Average Switch Current, I(AVG) ..................................... 250mA

Junction Temperature .............................................. 150ºC

Storage Temperature Range ...................... –65ºC to 150ºC

Lead Temperature (Soldering 10 sec.) ..................... 260ºC

ELECTRICAL CHARACTERISTICS

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

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SUPPLY

IIN

VIN Current

VIN = VOUT – 0.2V

µA

IOUT(Q)

VOUT Quiescent Current

µA

VL Quiescent Current

1µA

REFERENCE

VREF

Output Voltage

0 < IREF < –5µA

190

200

210

PFM REGULATOR

tON

Pulse Width

4.5

5.5

µs

OUTPUT VOLTAGE

VOUT

Output Voltage

-3 Suffix

3.2

3.3

3.4

tON = 0 at VOUT(MAX),

4.5µs

£ tON £ 5.5µs

-5 Suffix

4.85

5.0

5.15

at VOUT(MIN)

Load Regulation

See Figure 1, -3 Suffix

3.2

3.3

3.4

VIN = 1.2V, IOUT £ 10mA

See Figure 1, -3 Suffix

3.2

3.3

3.4

VIN = 2.4V, IOUT £ 65mA

See Figure 1, -5 Suffix

4.85

5.0

5.15

VIN = 1.2V, IOUT £ 18mA

See Figure 1, -5 Suffix

4.85

5.0

5.15

VIN = 2.4V, IOUT £ 85mA

Undervoltage Lockout Threshold

0.85

0.95

RESET COMPARATOR

DETECT Threshold

194

200

206

DETECT Bias Current

–100

100

RESET Output High Voltage

IOH = 100µA

VOUT – 0.2

RESET Output Low Voltage

IOL = -100µA

0.2

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

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