AP1603

STEP-UP DC/DC CONVERTER

AP1603 Rev. 1

3 of 8

NOVEMBER 2006

www.diodes.com

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

Supply Voltage (OUT to GND)

-0.3 to 5.5

V

REF to GND

V

Switch Voltage (LX to GND)

V

Output Current (OUT)

-0.8 to 0.2

A

Switch Current (LX)

-0.8 to 0.2

A

Storage Temperature Range

-65 to +150

Operation Temperature Range

-40 to +85

Electrical Characteristics

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

Minimum Input Voltage

-

0.9

-

V

Operating Voltage

1.1

-

5.5

V

Start-Up Voltage

RL = 3kΩ (Note 3)

-

0.9

1.1

V

Start-Up Voltage Tempco

-

-4

-

mV/°C

Output Voltage Range

2

-

5.5

V

100

150

-

Steady-State Output Current

(Note 4)

-

80

-

mA

Reference Voltage

1.196

1.22

1.244

V

3.17

3.3

3.43

Output Voltage

FB = GND

4.8

5

5.2

V

TEMPCO

Reference Voltage Tempco

-

0.05

-

mV/°C

Reference Voltage Load

Regulation

-

15

80

mV

Reference Voltage Line

Regulation

-

0.08

1.5

mV/V

Internal NFET, PFET

On-Resistance

-

0.6

1.0

Ω

LX Switch Current Limit

(NFET)

0.3

0.35

0.4

A

LX Leakage Current

-

0.05

1

µA

Operating Current into OUT

-

16

35

µA

Shutdown Current into OUT

SHDN

= GND

-

0.1

1

µA

Efficiency

-

90

-

%

LX Switch On-Time

3

4

7

µs

LX Switch Off-Time

1.0

1.2

1.4

µs

SHDN

Input Current

-

0.07

50

nA

-

-

0.2

SHDN

Input Voltage

0.8

-

-

Note: 3. Start-up voltage operation is guaranteed with the addition of a Schottky 1N5819 external diode between the input and output.

4. Steady-state output current indicates that the device maintains output voltage regulation under load.