Datasheet

ADP1877 Data Sheet
Rev. D | Page 4 of 32
Parameter Symbol Conditions Min Typ Max Unit
LOGIC INPUTS
EN1, EN2 EN1/EN2 rising 0.57 0.63 0.68 V
EN1, EN2 Hysteresis 0.03 V
EN1, EN2 Input Leakage Current I
EN
V
IN
= 2.75 V to 14.5 V 1 200 nA
SYNC Logic Input Low 1.3 V
SYNC Logic Input High 1.9 V
SYNC Input Leakage Current I
SYNC
SYNC = 5 V, internal 1 MΩ pull-down 5 6.5 A
GATE DRIVERS
DH Rise Time C
DH
= 3 nF, V
BST
− V
SW
= 5 V 16 ns
DH Fall Time C
DH
= 3 nF, V
BST
− V
SW
= 5 V 14 ns
DL Rise Time C
DL
= 3 nF 16 ns
DL Fall Time C
DL
= 3 nF 14 ns
DH to DL Dead Time External 3 nF is connected to DH and DL 25 ns
DH or DL Driver R
ON
, Sourcing
Current
1
R
ON_SOURC
Sourcing 2 A with a 100 ns pulse 2 Ω
Sourcing 1 A with a 100 ns pulse, V
IN
= 3 V 2.3 Ω
DH or DL Driver R
ON
, Tempco TC
RON
V
IN
= 3 V or 12 V 0.3 %/
o
C
DH or DL Driver R
ON
, Sinking
Current
1
R
ON_SINK
Sinking 2 A with a 100 ns pulse 1.5 Ω
Sinking 1 A with a 100 ns pulse, V
IN
= 3 V 2 Ω
DH Maximum Duty Cycle f
OSC
= 300 kHz 90 %
DH Maximum Duty Cycle f
OSC
= 1500 kHz 50 %
Minimum DH On Time f
OSC
= 200 kHz to 1500 kHz 130 ns
Minimum DH Off Time f
OSC
= 200 kHz to 1500 kHz 330 ns
Minimum DL On Time f
OSC
= 200 kHz to 1500 kHz 280 ns
COMP VOLTAGE RANGE
COMP Pulse Skip Threshold V
COMP,THRES
In pulse skip mode 0.9 V
COMP Clamp High Voltage V
COMP,HIGH
2.25 V
THERMAL SHUTDOWN
Thermal Shutdown Threshold T
TMSD
155
°C
Thermal Shutdown Hysteresis 20
°C
OVERVOLTAGE AND POWER GOOD
THRESHOLDS
FB Overvoltage Threshold V
OV
V
FB
rising 0.67 0.7 0.73 V
FB Overvoltage Hysteresis 40 mV
FB Undervoltage Threshold V
UV
V
FB
rising 0.51 0.54 0.57 V
FB Undervoltage Hysteresis 30 mV
TRK INPUT VOLTAGE RANGE 0 5 V
FB TO TRK OFFSET VOLTAGE TRK = 0.5 V to 0.6 V; offset = V
FB
− V
TRK
−120 −70 −5 mV
SOFT START
SS Output Current I
SS
During start-up 4.6 6.5 8.4 µA
SS Pull-Down Resistor During a fault condition 1 kΩ