Datasheet

Data Sheet ADP1870/ADP1871
Rev. B | Page 3 of 44
SPECIFICATIONS
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). V
REG
= 5 V,
V
BST
− V
SW
= V
REG
− 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 Conditions Min Typ Max Unit
POWER SUPPLY CHARACTERISTICS
High Input Voltage Range V
IN
C
IN
= 22 µF to PGND (at Pin 1)
ADP1870ARMZ-0.3/ADP1871ARMZ-0.3 (300 kHz) 2.95 12 20 V
ADP1870ARMZ-0.6/ADP1871ARMZ-0.6 (600 kHz) 2.95 12 20 V
ADP1870ARMZ-1.0/ADP1871ARMZ-1.0 (1.0 MHz) 3.25 12 20 V
Quiescent Current I
Q_REG
+ I
Q_BST
V
FB
= 1.5 V, no switching 1.1 mA
Shutdown Current I
REG,SD
+
I
BST,SD
COMP/EN < 285 mV 190 280 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 should not be loaded externally because it is
intended to only bias internal circuitry.
VREG Operational Output Voltage V
REG
C
VREG
= 1 µF to PGND, 0.22 µF to GND, V
IN
= 2.95 V to 20 V
ADP1870ARMZ-0.3/ADP1871ARMZ-0.3 (300 kHz) 2.75 5 5.5 V
ADP1870ARMZ-0.6/ADP1871ARMZ-0.6 (600 kHz) 2.75 5 5.5 V
ADP1870ARMZ-1.0/ADP1871ARMZ-1.0 (1.0 MHz) 3.05 5 5.5 V
VREG Output in Regulation V
IN
= 7 V, 100 mA 4.8 4.981 5.16 V
V
IN
= 12 V, 100 mA 4.8 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
33
mV
Line Regulation V
IN
= 7 V to 20 V, 20 mA 2.5 mV
V
IN
= 7 V to 20 V, 100 mA 2.0 mV
V
IN
to V
REG
Dropout Voltage 100 mA out of V
REG
, V
IN
≤ 5 V 300 415 mV
Short VREG to PGND V
IN
= 20 V 229 320 mA
SOFT START
Soft Start Period See Figure 58 3.0 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
V
FB
= 0.6 V, COMP/EN = released 1 50 nA
CURRENT-SENSE AMPLIFIER GAIN
Programming Resistor (RES)
Value from DRVL 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
ADP1870ARMZ-0.3/
ADP1871ARMZ-0.3 (300 kHz)
300
kHz
On-Time V
IN
= 5 V, V
OUT
= 2 V, T
J
= 25°C 1120 1200 1280 ns
Minimum On-Time V
IN
= 20 V 146 190 ns
Minimum Off-Time 84% duty cycle (maximum) 340 400 ns