Datasheet

Data Sheet ADP1877
Rev. D | Page 5 of 32
Parameter Symbol Conditions Min Typ Max Unit
PGOOD
PGOOD Pull-up Resistor R
PGOOD
Internal pull-up resistor to VCCO 12.5 kΩ
PGOOD Delay 12 µs
Overvoltage or Undervoltage
This is the minimum duration required to trip
the PGOOD signal.
12 µs
Minimum Duration
ILIM1, ILIM2 Threshold Voltage
1
Relative to PGND −5 0 +5 mV
ILIM1, ILIM2 Output Current ILIM = PGND 40 50 60
μA
Current Sense Blanking Period
After DL goes high, current limit is not sensed
during this period.
100 ns
INTEGRATED RECTIFIER
(BOOST DIODE) RESISTANCE
At 20 mA forward current 16 Ω
ZERO CURRENT CROSS OFFSET
(SW TO PGND)
1
In pulse skip mode only; f
OSC
= 600 kHz 0 2 4 mV
1
Guaranteed by design.
2
Connect V
IN
to VCCO when V
IN
< 5.5 V. For applications with V
IN
< 5.5 V and V
IN
not connected to VCCO, keep in mind that VCCO = V
IN
− VDROPOUT. VCCO must be ≥
2.75 V for proper operation.