MCP1253 datasheet(3/18 Pages) MICROCHIP

3 / 18 page

 2002 Microchip Technology Inc.

DS21752A-page 3

MCP1252/3

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

Power Supply Voltage, VIN...............................................6.0V

Voltage on Any Pin w.r.t. GND ............... -0.3V to (VIN + 0.3V)

Output Short Circuit Duration ................................continuous

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

Ambient Temperature with Power Applied ....-55°C to +125°C

Junction Temperature ................................................. +150°C

ESD Ratings:

Human Body Model (1.5 k

Ω in Series with 100 pF ......≥ 4kV

Machine Body Model (200 pF, No Series Resistance

≥ 400V

†Notice: Stresses above those listed under “Maximum Rat-

ings” 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 listings of this specification is not implied. Expo-

sure to maximum rating conditions for extended periods may

affect device reliability.

PIN FUNCTION TABLE

ELECTRICAL CHARACTERISTICS

Name

Function

PGOOD

Open-Drain Power GOOD Output

VOUT

Regulated Output Voltage

VIN

Power Supply Input

GND

Ground Terminal

C-

Flying Capacitor Negative Terminal

C+

Flying Capacitor Positive Terminal

SHDN

Shutdown Mode, Active-Low Input

SELECT

Output Voltage Select Pin.

(MCP1252-33X50, MCP1253-33X50)

Feedback Input Pin for Adjustable Output

(MCP1252-ADJ, MCP1253-ADJ)

Electrical Specifications: Unless otherwise specified, all limits are specified for TA = -40°C to +85°C, SHDN = VIN,

CIN = COUT = 10 µF, CFLY = 1 µF, IOUT = 10 mA. Typical values are for TA = +25°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = VIN, VOUT = 3.3V

Supply Voltage

VIN

2.1

—

5.5

Output Voltage Accuracy

VOUT

-2.5

+/-0.5

+2.5

2.3V

≤ VIN < 2.5V, IOUT ≤ 80 mA

2.5V

≤ VIN ≤ 5.5V, IOUT ≤ 120 mA

Output Current

IOUT

120

100

150

—mA

2.3V

≤ VIN < 2.5V

2.5V

≤ VIN ≤ 5.5V

SELECT Logic Input Voltage High

VIH

1.4

—

MCP1252-33X50, MCP1253-33X50

Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = GND, VOUT = 5.0V

Supply Voltage

VIN

2.7

—

5.5

Output Voltage Accuracy

VOUT

-2.5

+/-0.5

+2.5

2.7V

≤ VIN < 3.0V, IOUT ≤ 40 mA

3.0V

≤ VIN ≤ 5.5V, IOUT ≤ 120 mA

Output Current

IOUT

120

150

—mA

2.7V

≤ VIN < 3.0V

3.0V

≤ VIN ≤ 5.5V

SELECT Logic Input Voltage Low

VIL

—

0.4

MCP1252-33X50, MCP1253-33X50

Adjustable Output - MCP1252-ADJ, MCP1253-ADJ

Supply Voltage

VIN

2.0

—

5.5

Output Voltage Adjustment Range

VOUT

1.5

—

5.5

VOUT(MAX) < 2 x VIN

FB Regulation Voltage

VFB

1.18

1.21

1.24

MCP1252-ADJ, MCP1253-ADJ

ALL DEVICES

Supply Current

IDD

—60

120

µA

No load

Output Short-Circuit Current

ISC

—200

—

VOUT = GND, foldback current

Shutdown Current

ISHDN

—

0.1

2.0

µA

SHDN = 0V

Power Efficiency

—81

—%

VIN = 3.0V, VOUT = 5V

VIN = 3.6V, VOUT = 5V

IOUT =120 mA

SHDN Logic Input Voltage Low

VIL

——

0.4

SHDN Logic Input Voltage High

VIH

1.4

—

PGOOD Threshold Voltage

VTH

—0.93VOUT

—V

PGOOD Hysteresis

VHYS

—0.04VOUT

—V

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