Adjustable, Step-Down,

Current-Mode PWM Regulators

_______________________________________________________________________________________

3

Note 1: Output voltage tolerance over temperature is ±4.5% plus the tolerances of R3 and R4 in Figure 3.

Note 2: The standby current typically settles to 25µA (over temperature) within 2 seconds; however, to decrease test time, the part

is guaranteed at a 100µA maximum value.

PARAMETER

MAX758A

MIN

TYP

MAX

MAX750A

MIN

TYP

MAX

UNITS

3.75

4.00

3.5

0.5

1.0

1.15

1.22

1.30

50

130

160

190

7500

3.75

4.00

Undervoltage

Lockout

3.5

V

LX On Resistance

0.5

Ω

LX Leakage Current

1.0

µA

Reference Voltage

1.15

1.22

1.30

V

Reference Drift

50

ppm/°C

Oscillator Frequency

kHz

Compensation Pin

Impedance

7500

Ω

CONDITIONS

V+ rising

V+ falling

ELECTRICAL CHARACTERISTICS (continued)

__________________________________________Typical Operating Characteristics

100

60

0

600

MAX750A

EFFICIENCY vs. OUTPUT CURRENT

70

OUTPUT CURRENT (mA)

200

400

90

80

800

1000

V+ = 5.5V

V+ = 7V

V+ = 9V

V+ = 11V

(NOTES 3, 6)

100

60

0

600

MAX758A

EFFICIENCY vs. OUTPUT CURRENT

70

OUTPUT CURRENT (mA)

200

400

90

80

800

1000

V+ = 6V

V+ = 8V

V+ = 12V

V+ = 16V

(NOTES 3, 6)

130

170

210