Datasheet
Data Sheet ADP1874/ADP1875
Rev. A | Page 3 of 44
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). V
IN
= 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) to PGND (at Pin 1)
ADP1874ARQZ-0.3/ADP1875ARQZ-0.3 (300 kHz) 2.95 12 20 V
ADP1874ARQZ-0.6/ADP1875ARQZ-0.6 (600 kHz) 2.95 12 20 V
ADP1874ARQZ-1.0/ADP1875ARQZ-1.0 (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 V
IN
(see Figure 35 for temperature variation) 2.65 V
UVLO Hysteresis Falling V
IN
from operational state 190 mV
INTERNAL REGULATOR
CHARACTERISTICS
VREG and VREG_IN tied together and should not be
loaded externally because they are intended to only
bias internal circuitry
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
ADP1874ARQZ-0.3/ADP1875ARQZ-0.3 (300 kHz) 2.75 5 5.5 V
ADP1874ARQZ-0.6/ADP1875ARQZ-0.6 (600 kHz) 2.75 5 5.5 V
ADP1874ARQZ-1.0/ADP1875ARQZ-1.0 (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 2.5 mV
V
IN
= 7 V to 20 V, 100 mA 2 mV
VIN to VREG Dropout Voltage 100 mA out of VREG, V
IN
≤ 5 V 300 415 mV
Short VREG to PGND V
IN
= 20 V 229 320 mA
SOFT START
Soft Start Period Calculation Connect external capacitor from SS pin to GND,
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
ADP1874ARQZ-0.3/
ADP1875ARQZ-0.3 (300 kHz)
300 kHz
On-Time VIN = 5 V, V
OUT
= 2 V, T
J
= 25°C 1120 1200 1280 ns
Minimum On-Time VIN = 20 V 145 190 ns
Minimum Off-Time 84% duty cycle (maximum) 340 400 ns