isl88550a Intersil Corporation, isl88550a Datasheet - Page 4

• Manufacturer Part Number: isl88550a
• Description: Synchronous Step Down Controller With Sourcing And Sinking Ldo Regulator
• Manufacturer: Intersil Corporation

Electrical Specifications
FAULT DETECTION
OVP Trip Threshold (Referenced to nominal
V
UVP Trip Level Referred to Nominal V
POK1 Trip Level Referred to Nominal V
POK2 Trip Level Referred to Nominal VTTS
and VTTR
POK2 Disable Threshold (Measured at
REFIN)
UVP Blanking Time
OVP, UVP, POK_ Propagation Delay
POK_ Output Low Voltage
POK_ Leakage Current
ILIM Adjustment Range
ILIM Input Leakage Current
Current Limit Threshold (Fixed)
PGND1 to PHASE
Current Limit Threshold (Adjustable)
PGND1 to PHASE
Current-Limit Threshold (Negative Direction)
PGND1 to PHASE
Current-Limit Threshold (Negative Direction)
PGND1 to PHASE
Current-Limit Threshold (Zero Crossing)
PGND1 to PHASE
Thermal Shutdown Threshold
INTERNAL BOOT DIODE
V
I
MOSFET DRIVERS
UGATE Gate Driver ON-Resistance
LGATE Gate Driver ON-Resistance in High
State
LGATE Gate Driver ON-Resistance in Low
State
Dead Time (Additional to Adaptive Delay)
INPUTS AND OUTPUTS
Logic Input Threshold High (SHDNA#, SKIP#,
STBY#)
Logic Input Current (SHDNA#, SKIP#, STBY#)
FB Input Logic Level
Input Bias Current (FB)
BOOT_LEAKAGE
OUT
D
Forward Voltage
)
PARAMETER
Leakage Current
4
V
FB = SKIP# = OVP/UVP = GND. PGND1 = PGND2 = PHASE = GND, VTTS = VTT, t
+85°C, unless otherwise noted. Typical values are at T
IN
OUT
= +15V, V
OUT
UVP/OVP = AV
Lower level, falling edge, 1% hysteresis
Upper level, rising edge, 1% hysteresis
Lower level, falling edge, 1% hysteresis
Upper level, rising edge, 1% hysteresis
V
From rising edge of SHDNA#
I
V
ILIM = AV
V
SKIP# = AV
SKIP# = AV
Rising
Hysteresis
PVCC - V
V
V
LGATE rising
UGATE rising
Rising edge
Hysteresis
Low (2.5V output)
SINK
DD
REFIN
POK_
ILIM
BOOT
BOOT
= AV
= 4mA
= 2V
= 5.5V, VFB = 0.8V, VTTS = 1.3V
= 25V, PHASE = 20V, PVCC = 5V
- V
rising (Hysteresis = 75mV typical)
DD
BOOT
DD
PHASE
DD
DD,
= SHDNA# = STBY# = BOOT = ILIM = 5V, OUT = REFIN = VTTI = 2.5V,
, I
DD
ILIM = 2V
ISL88550A
F
CONDITIONS
= 5V
= 10mA
A
= +25°C (Note 4). (Continued)
107.5
87.5
0.25
MIN
-0.1
110
107
170
-75
0.7
1.2
65
87
45
-1
8
-250
TYP
0.60
114
110
110
200
150
300
225
-60
1.5
1.5
0.6
1.7
70
90
90
14
10
50
15
30
30
3
ON
= OPEN, T
112.5
MAX
92.5
2.00
0.70
2.20
118
113
235
500
0.9
0.3
0.1
-45
0.1
0.1
75
93
25
55
1
5
5
3
1
A
October 1, 2007
= -40°C to
FN6168.2
UNIT
mV
mV
mV
mV
mV
mV
ms
µA
µA
nA
µA
µA
µs
°C
°C
ns
ns
%
%
%
%
%
%
V
V
V
V
Ω
Ω
Ω
V
V