Datasheet
Data Sheet ADP1878/ADP1879
Rev. B | 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 − V
RECT_DROP
(see Figure 40 to Figure 42). VIN = 12 V. The specifications are valid for T
J
= −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 C
VIN
= 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 12 20 V
ADP1878ACPZ-0.6-R7/ADP1879ACPZ-0.6-R7 (600 kHz) 2.95 12 20 V
ADP1878ACPZ-1.0-R7/ADP1879ACPZ-1.0-R7 (1.0 MHz) 3.25 12 20 V
Quiescent Current I
Q_REG
+
I
Q_BST
FB = 1.5 V, no switching 1.1 mA
Shutdown Current I
REG,SD
+
I
BST,SD
EN < 600 mV 140 225 µA
Undervoltage Lockout UVLO Rising VIN (see Figure 35 for temperature variation) 2.65 V
UVLO Hysteresis Falling VIN from operational state 178 mV
INTERNAL REGULATOR
CHARACTERISTICS
Do not load VREG externally because it is intended to
bias internal circuitry only
VREG Operational Output Voltage
VREG
C
VREG
= 4.7 µF to PGND, 0.22 µF to GND, V
IN
= 2.95 V to 20 V
ADP1878ACPZ-0.3-R7/ADP1879ACPZ-0.3-R7 (300 kHz) 2.75 5 5.5 V
ADP1878ACPZ-0.6-R7/ADP1879ACPZ-0.6-R7 (600 kHz) 2.75 5 5.5 V
ADP1878ACPZ-1.0-R7/ADP1879ACPZ-1.0-R7 (1.0 MHz) 3.05 5 5.5 V
VREG Output in Regulation V
IN
= 7 V, 100 mA 4.82 4.981 5.16 V
V
IN
= 12 V, 100 mA 4.83 4.982 5.16 V
Load Regulation 0 mA to 100 mA, V
IN
= 7 V 32 mV
0 mA to 100 mA, V
IN
= 20 V 34 mV
Line Regulation V
IN
= 7 V to 20 V, 20 mA 1.8 mV
V
IN
= 7 V to 20 V, 100 mA 2.0 mV
VIN to VREG Dropout Voltage 100 mA out of VREG, V
IN
≤ 5 V 306 415 mV
Short VREG to PGND V
IN
= 20 V 229 320 mA
SOFT START Connect external capacitor from SS pin to GND,
Soft Start Period Calculation C
SS
= 10 nF/ms 10 nF/ms
ERROR AMPLIFER
FB Regulation Voltage V
FB
T
J
= 25°C 600 mV
T
J
= −40°C to +85°C 596 600 604 mV
T
J
= −40°C to +125°C 594.2 600 605.8 mV
Transconductance G
m
320 496 670 µS
FB Input Leakage Current I
FB, LEAK
FB = 0.6 V, EN = VREG 1 50 nA
CURRENT SENSE AMPLIFIER GAIN
Programming Resistor (RES)
Value from RES to PGND
RES = 47 kΩ ± 1% 2.7 3 3.3 V/V
RES = 22 kΩ ± 1% 5.5 6 6.5 V/V
RES = none 11 12 13 V/V
RES = 100 kΩ ± 1%
22
24
26
V/V
SWITCHING FREQUENCY Typical values measured at 50% time points with 0 nF at
DRVH and DRVL; maximum values are guaranteed by
bench evaluation
1
ADP1878ACPZ-0.3-R7/
ADP1879ACPZ-0.3-R7
300 kHz
On Time V
IN
= 5 V, V
OUT
= 2 V, T
J
= 25°C 1120 1200 1345 ns
Minimum On Time V
IN
= 20 V 145 190 ns
Minimum Off Time 84% duty cycle (maximum) 340 400 ns