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MAX1958

W-CDMA/N-CDMA Cellular Phone HBT PA Management ICs

Maxim Integrated 

W-CDMA/N-CDMA Cellular Phone HBT PA

Management ICs

ELECTRICAL CHARACTERISTICS (STEP-DOWN CONVERTER)

(VINP = VIN = VVCC = V SHDN1 = 3.6V, VPWM = VPGND = VAGND = V SHDN2 = V SHDN3 = 0, VADJ = 1.25V, COMP = IN- = IN+ =

AOUT = TOUT = unconnected, CREF = 0.1µF, TA = -40°C to +85°C, VOUT for MAX1958 = 2.2V, VOUT for MAX1959 = 1.7V, unless

otherwise noted.) (Note 5)

PARAMETER

Supply Voltage Range

Undervoltage Lockout Threshold

Quiescent Current

Quiescent Current in Dropout

Shutdown Supply Current

ERROR AMPLIFIER

OUT Voltage Accuracy

(MAX1958)

OUT Voltage Accuracy

(MAX1959)

OUT Input Current (MAX1958)

OUT Input Current (MAX1959)

ADJ Input Current (MAX1958)

ADJ Input Current (MAX1959)

Positive COMP Output Current

(MAX1958)

Positive COMP Output Current

(MAX1959)

Negative COMP Output Current

(MAX1958)

Negative COMP Output Current

(MAX1959)

REFERENCE

REF Output Voltage

REF Load Regulation

Undervoltage Lockout Threshold

Supply Rejection

CONDITIONS

Rising or falling, hysteresis is 1%

PWM = AGND (MAX1958)

PWM = AGND (MAX1959)

MAX1958

MAX1959

V SHDN1 = 0

VADJ = 1.932V, ILOAD = 0 to 600mA, VPWM = VIN = 3.8V

VADJ = 0.426V, ILOAD = 0 to 30mA, VPWM = 0

VADJ = 0.426V, ILOAD = 0 to 30mA, VPWM = VIN = 4.2V

VADJ = 2.2V, ILOAD = 0 to 600mA, VPWM = VIN = 4V

VADJ = 0.9V, ILOAD = 0 to 30mA, VPWM = 0

VADJ = 0.9V, ILOAD = 0 to 30mA, VPWM = VIN = 4.2V

VOUT = 0.75V

VOUT = 3.4V

VOUT = 1V

VOUT = 3.6V

VADJ = 0.426V to 1.932V

VADJ = 0.9V to 2.2V

VADJ = 1V, VOUT = 1.5V, VCOMP = 1.25V

VADJ = 1V, VOUT =1V, VCOMP = 1.25V

VADJ = 1V, VOUT = 2V, VCOMP = 1.25V

VADJ = 1V, VOUT = 1.4V, VCOMP =1.25V

10µA < IREF < 100µA

Rising or falling, 1% hysteresis

2.6V < VIN < 5.5V

MIN

2.6

2.20

3.36

0.739

0.739

3.570

0.98

0.98

2

11

2.5

10.0

-150

-150

-27.0

-27.0

6.5

6.5

1.226

0.85

TYP

MAX

5.5

2.55

300

450

550

600

6

UNITS

V

V

µA

µA

µA

3.44

0.761

V

0.761

3.625

1.02

V

1.02

6

µA

25

6.5

µA

23.0

+150

nA

+150

nA

-6.5

µA

-6.5

µA

27.0

µA

27.0

µA

1.275

6.25

1.10

1.7

V

mV

V

mV/V

6 _______________________________________________________________________________________

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