MAX779LC データシートの表示（PDF） - Maxim Integrated

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MAX779LC

Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters

Maxim Integrated 

Low-Voltage Input, 3V/3.3V/5V/

Adjustable Output, Step-Up DC-DC Converters

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +2.5V, ILOAD = 0mA, L = 22µH, COUT = 100µF, SHDN and ILIM connected to IN, AGND connected to PGND, TA = TMIN to TMAX,

typical values are at TA = +25°C, unless otherwise noted.)

PARAMETER

SHDN Threshold

SHDN Enable Delay

Current Limit

Current-Limit Temperature

Coefficient

Switch Saturation Voltage

Maximum Switch On Time

Minimum Switch Off Time

Rectifier Forward Voltage Drop

Error-Comparator Trip Point

FB Pin Bias Current

Switch Off Leakage Current

Rectifier Off Leakage Current

VIN = 1V to 4.5V

VIN = 2.5V

CONDITIONS

ISW = 400mA

ISW = 600mA

ISW = 1000mA

VIN = 2.5V

VIN = 1.8V

VIN = 1V

MAX777L, MAX779L

MAX778

ISW = 400mA

ISW = 600mA

ISW = 1000mA

MAX779L, over operating input voltage (Note 5)

MAX779L, VFB = 0.3V

MIN TYP MAX

VIN/2 + 0.25

1.20

1.6

150

1.0

UNITS

V

µs

A

-0.3

%/°C

0.275

0.33

V

0.50

4.0

5.9

µs

12.6

1.2

µs

2.2

0.21

0.31

V

0.50

197.5 202.5 207.5 mV

10

40

nA

0.1

µA

0.1

µA

Note 2: Output in regulation, VOUT = VOUT (nominal) ±4%.

Note 3: At high VIN to VOUT differentials, the maximum load current is limited by the maximum allowable power dissipation in the

package (see Absolute Maximum Ratings).

Note 4: Minimum value is production tested. Maximum value is guaranteed by design and is not production tested.

Note 5: VOUT is set to a target value of +5V by 0.1% external feedback resistors. VOUT is measured to be 5V ±2.5% to guarantee the

error comparator trip point.

Note 6: Start-Up guaranteed under these load conditions.

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