Datasheet

ADP1828
Rev. C | Page 3 of 36
SPECIFICATIONS
IN = 12 V, PV = V
EN
= V
TRK
= 5 V, SYNC = GND, unless otherwise specified. All limits at temperature extremes are guaranteed via corre-
lation using standard statistical quality control (SQC). T
J
= −40°C to +125°C, unless otherwise specified. Typical values are at T
A
= 25°C.
Table 1.
Parameter Conditions Min Typ Max Unit
POWER SUPPLY
IN Input Voltage PV is tied to VREG, IN is not tied to VREG (using internal regulator) 5.5 20 V
IN Input Voltage IN = PV = VREG, IN is tied to VREG (not using internal regulator) 3.0 5.5 V
IN Quiescent Current Not switching, I
VREG
= 0 mA 1.5 3.0 mA
IN Shutdown Current EN = GND 5 15 A
VREG-to-GND Shutdown Impedance EN = GND, IN is not tied to VREG 1.6 MΩ
VREG Undervoltage Lockout Threshold VREG rising 2.4 2.7 3.0 V
VREG Undervoltage Lockout Hysteresis VREG falling 0.125 V
ERROR AMPLIFER
FB Regulation Voltage T
A
= 25°C, TRK > 700 mV 597 600 603 mV
T
A
= 0°C to +70°C, TRK > 700 mV 595 605 mV
T
J
= −40°C to +125°C, TRK > 700 mV 591 609 mV
FB Input Bias Current 5 100 nA
Open-Loop Voltage Gain 70 dB
Gain-Bandwidth Product 20 MHz
COMP Sink Current 600 µA
COMP Source Current 120 µA
COMP Clamp High Voltage IN = VREG = 3 V 2.4 V
IN = 12 V 3.6 V
COMP Clamp Low Voltage 0.75 V
LINEAR REGULATOR
VREG Output Voltage
IN = 5 V+ dropout voltage to18 V, I
VREG
=100 mA
T
J
= −40°C to +125°C
4.75 5.0 5.25 V
VREG Load Regulation I
VREG
= 0 mA to 100 mA, IN = 5.25 V to 18 V −10 mV
VREG Line Regulation IN = 5 V+ dropout voltage to 18 V, no load 1 mV
VREG Current Limit VREG drops to 4 V 220 mA
VREG Short-Circuit Current VREG drops to 0.4 V 60 140 200 mA
IN to VREG Dropout Voltage
1
I
VREG
= 100 mA, IN < 5 V 0.6 1.0 V
VREG Minimum Output Capacitance 1 F
PWM CONTROLLER
VRAMP Peak-to-Peak Voltage
2
0.7 1.0 1.45 V
DH Maximum Duty Cycle FREQ = GND (300 kHz) 91 93 %
DH Minimum On Time Any frequency 100 ns
DL Minimum On Time Any frequency 200 ns
SOFT START
SS Pull-Up Resistance SS = GND 90 kΩ
SS Pull-Down Resistance SS = 0.6 V 6 kΩ
SS to FB Offset Voltage SS = 0 mV to 500 mV −45 mV
SS Pull-Up Voltage 0.8 V
TRACKING
TRK Common-Mode Input Voltage Range 0 600 mV
TRK to FB Offset Voltage TRK = 0 mV to 500 mV −5.5 +5 mV
TRK Input Bias Current 100 nA