ADP1878ACPZ-0.6-R7 datasheet(3/40 Pages) AD

3 / 40 page

Data Sheet

ADP1878/ADP1879

Rev. A | Page 3 of 40

SPECIFICATIONS

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). VREG = 5 V,

BST − SW = VREG − VRECT_DROP (see Figure 40 to Figure 42). VIN = 12 V. The specifications are valid for TJ = −40°C to +125°C,

unless otherwise specified.

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

POWER SUPPLY CHARACTERISTICS

High Input Voltage Range

VIN

CVIN = 22 μF(25 V rating) right at Pin 1 to PGND (Pin 11)

ADP1878ACPZ-0.3-R7/ADP1879ACPZ-0.3-R7 (300 kHz)

2.95

ADP1878ACPZ-0.6-R7/ADP1879ACPZ-0.6-R7 (600 kHz)

2.95

ADP1878ACPZ-1.0-R7/ADP1879ACPZ-1.0-R7 (1.0 MHz)

3.25

Quiescent Current

IQ_REG +

IQ_BST

FB = 1.5 V, no switching

1.1

Shutdown Current

IREG,SD +

IBST,SD

EN < 600 mV

140

225

μA

Undervoltage Lockout

UVLO

Rising VIN (see Figure 35 for temperature variation)

2.65

UVLO Hysteresis

Falling VIN from operational state

178

INTERNAL REGULATOR

CHARACTERISTICS

Do not load VREG externally because it is intended to

bias internal circuitry only

VREG Operational Output Voltage

VREG

CVREG = 4.7 μF to PGND, 0.22 μF to GND, VIN = 2.95 V to 20 V

ADP1878ACPZ-0.3-R7/ADP1879ACPZ-0.3-R7 (300 kHz)

2.75

5.5

ADP1878ACPZ-0.6-R7/ADP1879ACPZ-0.6-R7 (600 kHz)

2.75

5.5

ADP1878ACPZ-1.0-R7/ADP1879ACPZ-1.0-R7 (1.0 MHz)

3.05

5.5

VREG Output in Regulation

VIN = 7 V, 100 mA

4.82

4.981

5.16

VIN = 12 V, 100 mA

4.83

4.982

5.16

Load Regulation

0 mA to 100 mA, VIN = 7 V

0 mA to 100 mA, VIN = 20 V

Line Regulation

VIN = 7 V to 20 V, 20 mA

1.8

VIN = 7 V to 20 V, 100 mA

2.0

VIN to VREG Dropout Voltage

100 mA out of VREG, VIN ≤ 5 V

306

415

Short VREG to PGND

VIN = 20 V

229

320

SOFT START

Connect external capacitor from SS pin to GND,

Soft Start Period Calculation

CSS = 10 nF/ms

nF/ms

ERROR AMPLIFER

FB Regulation Voltage

VFB

TJ = 25°C

600

TJ = −40°C to +85°C

596

600

604

TJ = −40°C to +125°C

594.2

600

605.8

Transconductance

320

496

670

μS

FB Input Leakage Current

IFB, LEAK

FB = 0.6 V, EN = VREG

CURRENT SENSE AMPLIFIER GAIN

Programming Resistor (RES)

Value from RES to PGND

RES = 47 kΩ ± 1%

2.7

3.3

V/V

RES = 22 kΩ ± 1%

5.5

6.5

V/V

RES = none

V/V

RES = 100 kΩ ± 1%

V/V

SWITCHING FREQUENCY

Typical values measured at 50% time points with 0 nF at

DRVH and DRVL; maximum values are guaranteed by

bench evaluation1

ADP1878ACPZ-0.3-R7/

ADP1879ACPZ-0.3-R7

300

kHz

On Time

VIN = 5 V, VOUT = 2 V, TJ = 25°C

1120

1200

1345

Minimum On Time

VIN = 20 V

145

190

Minimum Off Time

84% duty cycle (maximum)

340

400

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