Datasheet

ADP1850 Data Sheet
Rev. A | Page 4 of 32
Parameter Symbol Conditions Min Typ Max Unit
GATE DRIVERS
DHx Rise Time C
DH
= 3 nF, V
BST
− V
SW
= 5 V 16 ns
DHx Fall Time C
DH
= 3 nF, V
BST
− V
SW
= 5 V 14 ns
DLx Rise Time C
DL
= 3 nF 16 ns
DLx Fall Time C
DL
= 3 nF 14 ns
DHx to DLx Dead Time External 3 nF is connected to DHx and DLx 25 ns
DHx or DLx Driver R
ON
, Sourcing
Current
1
R
ON_SOURCE
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
DHx or DLx Driver R
ON
, Tempco TC
RON
V
IN
= 3 V or 12 V 0.3 %/
o
C
DHx or DLx 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
DHx Maximum Duty Cycle f
SW
= 300 kHz 90 %
DHx Maximum Duty Cycle f
SW
= 1500 kHz 50 %
Minimum DHx On Time f
SW
= 200 kHz to 1500 kHz 135 ns
Minimum DHx Off Time f
SW
= 200 kHz to 1500 kHz 335 ns
Minimum DLx On Time f
SW
= 200 kHz to 1500 kHz 285 ns
COMPx VOLTAGE RANGE
COMPx Pulse Skip Threshold V
COMP,THRES
In pulse skip mode 0.9 V
COMPx 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
FBx Overvoltage Threshold V
OV
V
FB
rising 0.635 0.65 0.665 V
FBx Overvoltage Hysteresis 30 mV
FBx Undervoltage Threshold V
UV
V
FB
falling 0.525 0.55 0.578 V
FBx Undervoltage Hysteresis 30 mV
TRKx INPUT VOLTAGE RANGE 0 5 V
FBx TO TRKx OFFSET VOLTAGE TRKx = 0.1 V to 0.57 V, offset = V
FB
− V
TRK
−10 0 +10 mV
SOFT START
SSx Output Current I
SS
During start-up 4.6 6.5 8.4 µA
SSx Pull-Down Resistor During a fault condition 3 kΩ
FBx to SSx Offset V
SS
= 0.1 V to 0.6 V, offset = V
FB
− V
SS
−10 +10 mV
PGOODx
PGOODx Pull-up Resistor R
PGOOD
Internal pull-up resistor to VCCO 12.5 kΩ
PGOODx Delay 12 µs
Over Voltage or Under Voltage
This is the minimum duration required to trip
the PGOOD signal
10 µs
Minimum Duration
ILIM1, ILIM2 Threshold Voltage
1
Relative to PGNDx −5 0 +5 mV
ILIM1, ILIM2 Output Current ILIMx = PGNDx 47 50 53 µA
Current Sense Blanking Period
After DLx 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
(SWx TO PGNDx)
1
In pulse skip mode only, f
SW
= 600 kHz 0 2 4 mV
1
Guaranteed by design.
2
Connect V
IN
to VCCO when 2.75 V < V
IN
< 5.5 V.