MCP8021 datasheet(7/66 Pages) MICROCHIP

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DS20006265D-page 7

MCP8021/2

BIAS GENERATOR

+12V Regulated Charge Pump (VBOOT)

Charge Pump Current

ICP

—

VDD =9.0V

Charge Pump Start

CPSTART

12.50

12.75

—

Falling

Charge Pump Stop

CPSTOP

—

13.25

Rising

Charge Pump Frequency

CPFSW

—

76.80

—

kHz

VDD =9.0V

—0

—

VDD = 14V

Charge Pump Switch

Resistance

CPRDSON

—14

—



RDSON sum of high-side and

low-side (Note 1)

Output Voltage

VBOOT

—12

—

VDD  14V, IOUT =30 mA

912

—

 VDD  14V, CCP = 150 nF,

IOUT =20 mA

—

6.25V

 VDD  7V,

CCP = 270 nF, IOUT =15 mA

Output Voltage Tolerance

|TOLVOUT12|—

—

4.0

IOUT =30 mA

Output Capability

IBOOT

—

Average current

Output Current Limit

IBOOTLIMIT

Average current

Output Voltage Temperature

Coefficient

TCVOUT12

—

160

—

ppm/°C Note 1

Line Regulation

VOUT/

(VOUT x )|

—

0.1

0.5

%/V

14V < VDD < 19V,

IOUT =30 mA

Load Regulation

VOUT/VOUT|—

0.2

1.0

IOUT = 0.1 mA to 30 mA,

VDD = 14V

Power Supply Rejection Ratio

PSRR

—

f = 1 kHz, IOUT =10 mA (Note 1)

Output Capacitor Capacitance

Range

CVBOOT

4.7

—

µF

Ceramic, Tantalum, Electrolytic

(Note 1)

Output Capacitor ESR Range

CESRVBOOT

0.010

—

1.0



Note 1

Flying Capacitor Capacitance

Range

CCP

100

220

1000

Note 1

VBOOT Ready Threshold

V12SM_PG

—50

—

%VBOOT State machine VBOOT Power

Good threshold to move to next

state (Note 1)

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted: TJ = -40°C to +150°C; typical values are for +25°C, VDD = 13.5V,

CVBOOT = 4.7 µF, CVREG =4.7 µF, CCP = 220 nF.

Parameter

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1: Limits based on design, simulation or characterization. Not production tested.

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