MAX669 데이터 시트보기 (PDF) - Maxim Integrated

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MAX669

1.8V to 28V Input, PWM Step-Up Controllers in µMAX

Maxim Integrated 

1.8V to 28V Input, PWM Step-Up

Controllers in µMAX

ELECTRICAL CHARACTERISTICS (continued)

(VCC = VLDO = +5V, ROSC = 200kΩ, TA = -40°C to +85°C, unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

REF Output Voltage

REF Load Regulation

No load, CREF = 0.22µF

1.22

REF load = 0 to 50µA

REF Undervoltage Lockout Threshold

Rising edge, 1% hysteresis

1.0

OSCILLATOR

ROSC = 200kΩ ±1%

222

Oscillator Frequency

ROSC =100kΩ ±1%

425

ROSC = 500kΩ ±1%

85

ROSC = 200kΩ ±1%

87

Maximum Duty Cycle

ROSC = 100kΩ ±1%

86

ROSC = 500kΩ ±1%

86

Minimum SYNC Input-Pulse Duty Cycle

Minimum SYNC Input Low Pulse Width

SYNC Input Rise/Fall Time

Not tested

SYNC Input Frequency Range

100

SYNC/SHDN Input High Voltage

3.0V < VCC < 28V

2.0

1.8V < VCC < 3.0V (MAX669)

1.5

SYNC/SHDN Input Low Voltage

3.0V < VCC < 28V

1.8V < VCC < 3.0V (MAX669)

SYNC/SHDN Input Current

VSYNC/SHDN = 5V

VSYNC/SHDN = 28V

EXT On-Resistance

EXT high or low

Note 1: This is the VCC current consumed when active but not switching. Does not include gate-drive current.

Note 2: Limits at TA = -40°C are guaranteed by design.

MAX

1.28

-10

1.2

278

575

115

93

94

94

45

200

200

500

0.45

0.30

3.0

6.5

5

UNITS

V

mV

V

kHz

%

%

ns

ns

kHz

V

V

µA

Ω

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