MCP18480 datasheet(3/64 Pages) MICROCHIP

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 2003 Microchip Technology Inc.

DS20091B-page 3

MCP18480

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

Ambient Temperature under bias ........ –40°C to +85°C

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

Voltage on VPOS with respect to VNEG -0.3V to +15.0V

Voltage on DVTH, UVTH, VFB, OVO and UVHYS pins

with respect to VNEG .....VNEG – 0.3V to (VPOS + 0.3V)

Voltage on VREFIN, CL, SENSE, DRAINTH, ENABLE

and RESTART pins with respect to VNEG

........................................................ VNEG - 0.3V to 6V.

Total Power Dissipation (Note 1) .................... 800 mW

Max. Current out of VNEG pin.............................80 mA

Max. Current into VPOS pin ................................50 mA

Max. Output Current sunk by Gate pin............... 80 mA

Max. Output Current sunk by VREFOUT pin ..........5 mA

Max. Output Current sunk by any other

Output pin......................................................... 25 mA

Max. Output Current sourced by Gate pin ........200 µA

Max. Output Current sourced by VREFOUT pin .....5 mA

Max. Output Current sourced by any other

Output pin...........................................................25 mA

Junction to Ambient,

ΘJA

(20 pin SSOP Package) Derating ...............108.1

°C/W

Junction to Case,

ΘJC

(20 pin SSOP Package) Derating .................32.2

°C/W

Lead Temperature, Soldering, 10 seconds ........ 300

°C

† 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

operation listings of this specification is not implied. Exposure

to maximum rating conditions for extended periods may affect

device reliability.

Note 1: Power Dissipation is calculated as follows:

PDIS = VDD x {IDD - Σ IOH} + Σ{(VDD-VOH) x IOH} + Σ(VOL x IOL)

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, operating temperature: –40

°C ≤ TA ≤ +85°C (Industrial),

Supply Current: 5 mA

≤ IPOS ≤ 25 mA, RISET = 125 kΩ, CBYP = 2 µF.

Param.

No.

Parameter

Sym

Min

Typ (1)

Max

Units

Conditions

MD001

Current into shunt regulator

that produces VPOS output volt-

age that meets MD001A speci-

fication

IPOS1

—

ENABLE pin = 5V

—

ENABLE pin = VNEG

MD001A

Regulated Output Voltage

Differential of VPOS to VNEG

VPOS

10.4

12.0

13.4

See MD001

MD002

VREFOUT pin output voltage

VREFOUT

2.463

2.5

2.538

Load = 50 µA

MD010

VGATE pin output voltage

VGATE

VPOS - 2

VPOS -1

VPOS

MD011

Voltage on ISET pin

VISET

(VREFIN/2) -

0.02

VREFIN/2

(VREFIN/2)

+0.02

MD012A

Voltage on SENSE pin to

trigger current-limiting

VSENSE

VFB = VNEG

MD012B

31.0

VFB = VNEG + 0.25V

MD012C

VFB = VNEG + 0.5V

MD013

Undervoltage Threshold

UVTH

VREFIN

- 0.03

VREFIN

+ 0.03

MD014A

Overvoltage

Threshold

rising

OVTH

VREFIN

- 0.05

VREFIN

+ 0.05

VVREFIN = 2.5V

MD014B

falling

OVTH

VREFIN

- 0.035

VREFIN

- 0.02

VREFIN

- 0.005

VVREFIN = 2.5V

MD015

DRAIN Pin Input Threshold

Voltage

VDTH

100

130

Note 1: Data in the Typical (“Typ”) column is based on characterization results at +25

°C. This data is for design guidance only

and is not tested.

2: Negative current is defined as current sourced by the pin.

3: All voltages are with respect to the VNEG pin voltage.

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