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Data Sheet ADP1872/ADP1873
Rev. B | Page 3 of 40
SPECIFICATIONS
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). VDD = 5 V,
BST − SW = 5 V, VIN = 13 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 VIN ADP1872ARMZ-0.3/ADP1873ARMZ-0.3 (300 kHz) 2.75 12 20 V
ADP1872ARMZ-0.6/ADP1873ARMZ-0.6 (600 kHz) 2.75 12 20 V
ADP1872ARMZ-1.0/ADP1873ARMZ-1.0 (1.0 MHz) 3.0 12 20 V
Low Input Voltage Range VDD C
IN
= 1 µF to PGND, C
IN
= 0.22 µF to GND
2.75
5
5.5
V
ADP1872ARMZ-0.6/ADP1873ARMZ-0.6 (600 kHz) 2.75 5 5.5 V
ADP1872ARMZ-1.0/ADP1873ARMZ-1.0 (1.0 MHz) 3.0 5 5.5 V
Quiescent Current I
Q_DD
+ I
Q_BST
FB = 1.5 V, no switching 1.1 mA
Shutdown Current I
DD, SD
+ I
BST, SD
COMP/EN < 285 mV 140 215 µA
Undervoltage Lockout UVLO Rising VDD (See Figure 34 for temperature variation) 2.65 V
UVLO Hysteresis Falling VDD from operational state 190 mV
SOFT START
Soft Start Period See Figure 57 3.0 ms
ERROR AMPLIFER
FB Regulation Voltage V
FB
T
J
= 25°C 600 mV
T
J
= −40°C to +85°C 595.5 600 605.4 mV
T
J
= −40°C to +125°C 594.2 600 606.5 mV
Transconductance G
M
300 515 730 µs
FB Input Leakage Current I
FB, LEAK
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
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
ADP1872ARMZ-0.3/
ADP1873ARMZ-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) 320 385 ns
ADP1872ARMZ-0.6/
ADP1873ARMZ-0.6 (600 kHz)
600 kHz
On-Time VIN = 5 V, V
OUT
= 2 V, T
J
= 25°C 500 520 580 ns
Minimum On-Time VIN = 20 V, V
OUT
= 0.8 V 82 110 ns
Minimum Off-Time 65% duty cycle (maximum) 320 385 ns
ADP1872ARMZ-1.0/
ADP1873ARMZ-1.0 (1.0 MHz)
1.0 MHz
On-Time VIN = 5 V, V
OUT
= 2 V, T
J
= 25°C 285 312 340 ns
Minimum On-Time VIN = 20 V 60 85 ns
Minimum Off-Time 45% duty cycle (maximum) 320 385 ns