MCP1603-ADJISLASHOS datasheet(5/26 Pages) MICROCHIP

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DS22042A-page 5

MCP1603

Output Characteristics

Adjustable Output Voltage Range

VOUT

0.8

—

4.5

Note 2

Reference Feedback Voltage

VFB

—0.8

—

Reference Feedback Voltage

Tolerance

-3.0

—

+3.0

TA = -40°C to +25°C

-2.5

—

+2.5

TA = +25°C to +85°C

Feedback Input Bias Current

IVFB

—0.1

—

Output Voltage Tolerance Fixed

VOUT

-3.0%

+3.0%

TA = -40°C to +25°C, Note 3

VOUT

-2.5

+2.5

TA = +25°C to +85°C, Note 3

Line Regulation

VLINE-

REG

—0.3

—

%/V

VIN = VR + 1V to 5.5V,

IOUT =100 mA

Load Regulation

VLOAD-

REG

—0.35

—

VIN =VR +1.5V,

ILOAD = 100 mA to 500 mA

Internal Oscillator Frequency

FOSC

1.5

2.0

2.8

MHz

Start Up Time

TSS

—0.6

—

TR = 10% to 90%

RDSon P-Channel

RDSon-P

—

500

—

IP =100 mA

RDSon N-Channel

RDSon-N

—

500

—

IN = 100 mA

LX Pin Leakage Current

ILX

-1.0

±0.1

1.0

µA

SHDN =0V, VIN =5.5V,

LX =0V, LX =5.5V

Positive Current Limit Threshold

+ILX(MAX)

—

860

—

Note 6

DC CHARACTERISTICS (CONTINUED)

Electrical Characteristics: Unless otherwise indicated, VIN = SHDN = 3.6V, COUT = CIN = 4.7 µF, L = 4.7 µH, VOUT(ADJ) = 1.8V,

IOUT = 100 mA, TA = +25°C. Boldface specifications apply over the TA range of -40°C to +85°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note 1: The minimum VIN has to meet two conditions: VIN ≥ 2.7V and VIN ≥ VOUT + 0.5V.

2: Reference Feedback Voltage Tolerance applies to adjustable output voltage setting.

3: VR is the output voltage setting.

4: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable

temperature and the thermal resistance from junction to air (i.e. TA, TJ, θJA). Exceeding the maximum

allowable power dissipation causes the device to initiate thermal shutdown.

5: The internal MOSFET switches have an integral diode from the LX pin to the VIN pin, and from the LX pin

to the GND pin. In cases where these diodes are forward-biased, the package power dissipation limits

must be adhered to. Thermal protection is not able to limit the junction temperature for these cases.

6: The current limit threshold is a cycle-by-cycle peak current limit.

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