ISL78268 Datasheet, PDF (13/33 Pages) Intersil Corporation – Integrated 2A sourcing

ISL78268
Electrical Specifications Refer to the Block Diagram (page 6) and Typical Application Schematics (page 7). Operating conditions unless
otherwise noted: V_IN = 12V, V_PVCC = 5.2V and V_VCC = 5.2V, EN = 5.0V, T_A = -40°C to +125°C. Typicals are at T_A = +25°C.
Boldface limits apply across the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7) UNITS
GATE DRIVERS
UG Source Resistance
UG Source Current
UG Sink Resistance
UG Sink Current
LG Source Resistance
LG Source Current
LG Sink Resistance
LG Sink Current
UG to PH Pull-Down Resistance
R_UGSRC
I_UGSRC
R_UGPD
I_UGPD
R_LGSRC
I_LGSRC
R_LGPD
I_LGPD
50mA source current; V_BOOT - V_PH = 4.5V
UG - PH = 2.5V; V_BOOT - V_PH = 4.5V
100mA sink current; V_BOOT - V_PH = 4.5V
UG - PH = 2.5V; V_BOOT - V_PH = 4.5V
50mA source current
LG - PGND = 2.5V
100mA sink current
LG - PGND = 2.5V
1.2
Ω
2.0
A
0.65
Ω
3.0
A
1.0
Ω
2.0
A
0.55
Ω
3.0
A
50
kΩ
LG to PGND Pull-Down Resistance
50
kΩ
BOOT-PH Refreshing Detection Threshold
3.1
3.3
3.5
V
BOOT-PH Refreshing Detection Threshold
Hysteresis
100 150 250 mV
Dead-Time Delay - UG Falling to LG Rising
t_DT1
UG = OPEN, LG = OPEN
45
55
65
ns
Dead-Time Delay - LG Falling to UG Rising
t_DT2
UG = OPEN, LG ₌ OPEN
45
55
65
ns
OUTPUT OVERVOLTAGE DETECTION/PROTECTION (NOTE: FB_OVP response is selectable to be LATCHOFF or HICCUP)
FB Overvoltage Rising Trip Threshold
V_{FBOV_REF} Percentage of Reference Point, VFB = 1.6V
Selected LATCHOFF/HICCUP response.
111 115 118 %
FB Overvoltage Recovery Threshold
108 112 115 %
Overvoltage Threshold Hysteresis
3
%
FB Overvoltage Protection Delay
Overvoltage detection filter
1
µs
FB_OV Hiccup Retry Delay
500
ms
OUTPUT UNDERVOLTAGE DETECTION
FB Undervoltage Falling Threshold
FB Undervoltage Recovery Threshold
V_{FBUV_REF} Percentage of reference point, VFB = 1.6V
85 87.5 90
%
88 90.5 93
%
Undervoltage Hysteresis
3
%
POWER-GOOD MONITOR (OUTPUT OVERVOLTAGE, OUTPUT UNDERVOLTAGE, VIN OVERVOLTAGE)
PGOOD Leakage Current
PGOOD Low Voltage
PGOOD Rising Delay -1
PGOOD Rising Delay -2
PGOOD Falling Delay
PGOOD HIGH, V_{PGOOD =} 5V
PGOOD LOW, I_PGOOD = 0.5mA
From V_SS = 0.95*VREF to V_SS = V_SSCLAMP,
C_SS = 15nF
From V_SS = V_SSCLAMP to PGOOD HIGH
Blanking filter time before transition
1
µA
0.20 0.4
V
5.6
ms
0.5
ms
10
us
HIC/LATCH Pin
HIC/LATCH Input Pull-Down Current
HIC/LATCH Input High Threshold
V_HIC/LATCH = 5V
0.8
1
2
2
µA
V
HIC/LATCH Input Low Threshold
0.8
V
OVER-TEMPERATURE PROTECTION
Over-Temperature Threshold
160
°C
Over-Temperature Recovery Threshold
145
°C
NOTE:
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
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FN8657.3
December 12, 2014