MAX607 datasheet(3/12 Pages) MAXIM

3 / 12 page

Low-Profile, 5V/12V or Adjustable, Step-Up

DC-DC Converters for Flash Memory/PCMCIA Cards

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ELECTRICAL CHARACTERISTICS

(VIN = 3.3V, GND = PGND = FB = 0V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

Note 1: The load specification is guaranteed by DC parametric tests and is not production tested in circuit.

Note 2: Specifications to -40°C are guaranteed by design, not production tested.

VIN = 3V to 5.5V. For VFB below this voltage,

output regulates to 12V.

VSHDN = 0 or VIN

3V < VIN < 5V, FB = IN, ILOAD = 0 to 135mA

VIN = 5.5V

VIN = 3V

2V < (VOUT + 0.5V - VIN) < 8V (see Pulse-

Frequency-Modulation Control Scheme section)

3V < VIN < 5.5V

(tON = K / VIN)

VOUT = 13V

VSHDN = VIN, VSS = 150mV

VSHDN = 0, OUT = IN

MAX606

VLX = 12V

4.5V < VIN < 5.5V, FB = GND, ILOAD = 0 to 90mA

0.1V < VFB < (VIN - 0.1V)

VOUT = 13V

VSHDN = VSS = 0

CONDITIONS

MAX606

0.1

MAX607

FB Input Low Voltage

µA

±1

MAX607

SHDN Input Current

0.66VIN

SHDN Input High Voltage

0.25VIN

SHDN Input Low Voltage

0.3

0.7

Switch Off-Time Ratio

3.5

9.0

µs-V

1.8

4.5

Switch On-Time Constant (K)

µA

OUT Input Current

µA

Shutdown Quiescent Current

300

µA

500

Quiescent Supply Current

0.5

4.75

5.25

Output Voltage (Note 1)

2.4

2.8

3.0

5.5

Supply Voltage

Undervoltage Lockout Threshold

Ω

SS Resistance

0.55

1.25

Switch Current Limit

µA

Switch Off-Leakage

Ω

Switch On-Resistance

11.4

12.6

1.94

2.06

FB Regulation Setpoint

VIN

12.5

Adjustable Output Voltage Range

UNITS

MIN

TYP

MAX

PARAMETER

VIN = 3V to 5.5V. For VFB above this voltage,

output regulates to 5V.

VIN - 0.1

FB Input High Voltage

VFB = 2.05V, VOUT = 13V

200

FB Input Current

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