MAX1960(2003) データシートの表示（PDF） - Maxim Integrated

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MAX1960
(Rev.:2003)

2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining

Maxim Integrated 

2.35V to 5.5V, 0.5% Accurate, 1MHz PWM

Step-Down Controllers with Voltage Margining

ELECTRICAL CHARACTERISTICS

(VVCC = 3.3V, Circuits of Figures 9–12, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

PARAMETER

VCC Input Voltage Range

VCC Input Voltage UVLO

VDD Input Voltage UVLO

Output Voltage

DC Output Accuracy

Positive Voltage-Margining Shift

Negative Voltage-Margining Shift

FB Input Bias Current

Feedback Transconductance

COMP Discharge Resistance

Switching Frequency

SYNC Frequency Range

Maximum Duty Cycle

Maximum Duty Cycle

Quiescent Supply Current

Shutdown Supply Current

VDD Output Voltage

Reference Voltage (No Load)

CONDITIONS

Rising or falling

Rising or falling

MAX1960/MAX1962 (measured at FB)

MAX1961/MAX1962

(FB = VDD),

measured at output

MAX1960/MAX1961

SEL = GND

SEL = REF

SEL not connected

SEL = VDD

MAX1960/MAX1961

In shutdown

FSET/SYNC = GND

FSET/SYNC = VCC

f = 1MHz

f = 500kHz

MIN

2.35

1.95

3.90

0.8

0.795

1.492

1.789

2.482

3.272

3.8

-3.8

-0.2

1

450

880

450

80

90

2.7V ≤ VVCC ≤ 5.5V, ILOAD = 1mA to 50mA

2.35V ≤ VVCC ≤ 2.7V, ILOAD = 1mA to 35mA,

C1 = 4.7µF, C6 = 22µF

2.35V ≤ VVCC ≤ 3.6V with tripler, ILOAD = 1mA

to 50mA (circuit of Figure 12)

4.75

4.45

4.75

1.267

Positive Current-Limit Threshold

(VCS - VOUT)

MAX1962, VOUT = 2V

45

Negative Current-Limit Threshold

(VOUT - VCS)

MAX1962, VOUT = 2V

42

CS Bias Current

MAX1962, VCS = 3.3V

OUT Bias Current

MAX1961/MAX1962, VOUT = 3.3V

Current-Limit Threshold (Positive

Direction, Fixed, VPGND - VLX)

MAX1960/MAX1961, ILIM = VDD

58

Current-Limit Threshold (Negative

Direction, Fixed, VLX - VPGND)

MAX1960/MAX1961, ILIM = VDD

50

Current-Limit Threshold (Positive

MAX1960/MAX1961, RILIM = 160kΩ

100

Direction, Adjustable, VPGND - VLX)

RILIM = 400kΩ

250

TYP

MAX

5.50

2.3

4.45

0.805

1.508

1.809

2.517

3.339

4.2

-4.2

+0.2

3

100

550

1120

1200

15

15

5.25

UNITS

V

V

V

V

V

%

%

µA

µS

Ω

kHz

kHz

%

%

mA

µA

5.25

V

5.25

1.291

V

56

mV

64

mV

50

µA

50

µA

90

mV

85

mV

135

mV

306

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