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DS22042B-page 5

MCP1603/B/L

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

Output Short Circuit Current ................................. Continuous

Power Dissipation (Note 5) .......................... Internally Limited

Storage Temperature ....................................-65°C to +150°C

Ambient Temp. with Power Applied ................-40°C to +85°C

Operating Junction Temperature...................-40°C to +125°C

ESD Protection On All Pins:

HBM ............................................................................. 4 kV

MM ..............................................................................300V

† Notice: Stresses above those listed under "Maximum

Ratings" may cause permanent damage to the device.

This is a stress rating only and functional operation of

the device at those or any other conditions above those

indicated in the operational sections of this specifica-

tion is not intended. Exposure to maximum rating con-

ditions for extended periods may affect device

reliability.

DC CHARACTERISTICS

to +85°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Input Characteristics

Input Voltage

2.7

—

5.5

V

Note 1

Maximum Output Current

500

——

mA

Note 1

Shutdown Current

—

0.1

1

µA

SHDN = GND

Quiescent Current - PFM

—45

60

µA

device switching

Quiescent Current - PWM

1.0

2.7

4

mA

device switching (MCP1603B)

Shutdown/UVLO/Thermal Shutdown Characteristics

SHDN, Logic Input Voltage Low

——

15

SHDN, Logic Input Voltage High

45

——

SHDN, Input Leakage Current

-1.0

±0.1

1.0

µA

Undervoltage Lockout

UVLO

2.12

2.28

2.43

Undervoltage Lockout Hysteresis

—140

—

mV

Thermal Shutdown

—150

—

°C

Note 4, Note 5

Thermal Shutdown Hysteresis

—10

—

°C

Note 4, Note 5

Note 1:

The input voltage should be greater then the output voltage plus headroom voltage; higher load currents

increase the input voltage required for regulation. MCP1603B device requires a minimum load for

regulation. See Section 2.0, Typical Performance Curves for typical operating voltage ranges.

2:

Reference Feedback Voltage Tolerance applies to adjustable output voltage setting.

3:

4:

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

allowable power dissipation causes the device to initiate thermal shutdown.

5:

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.