ISL70001SEH Datasheet, PDF (8/17 Pages) Intersil Corporation – Rad Hard and SEE Hard 6A Synchronous Buck Regulator

ISL70001SEH
Electrical Specifications Unless otherwise noted, VIN = AVDD = DVDD = PVINx = EN = M/S = 3V or 5.5V;
GND = AGND = DGND = PGNDx = TDI = TDO = ZAP = 0V; FB = 0.65V; PORSEL = VIN for 4.5V ≤ VIN ≤ 5.5V and GND for V_IN < 4.5V,
SYNC = LXx = Open Circuit; PGOOD is pulled up to V_IN with a 1k resistor; REF is bypassed to GND with a 220nF capacitor; SS is bypassed to GND with a
100nF capacitor; I_OUT = 0A; T_A = T_J = +25°C. (Note 3). Boldface limits apply over the operating temperature range, -55°C to +125°C; over a total iodizing
dose of 100krad(Si) with exposure at a high dose rate of 50 - 300krad(Si)/s; and over a total iodizing dose of 50krad(Si) with exposure at a low dose rate
of <10mrad(Si)/s. (Continued)
PARAMETER
TEST CONDITIONS
MIN
(Note 4) TYP
MAX
(Note 4)
UNITS
POWER-ON RESET
POR Select (PORSEL)
Input High Threshold
Input Low Threshold
V_IN - 0.5 1.4
V
1.2
0.5
V
POR Select (PORSEL) Input Leakage
Current
V_IN = 5.5V, PORSEL = GND or V_IN
-1
0
1
µA
VIN POR
Rising Threshold, PORSEL = V_IN
Hysteresis, PORSEL = V_IN
Rising Threshold, PORSEL = GND
4.1
4.25
4.45
V
225
325
425
mV
2.65
2.8
2.95
V
Hysteresis, PORSEL = GND
90
175
260
mV
Enable (EN) Input Voltage
Rising/Falling Threshold
0.56
0.6
0.64
V
Enable (EN) Input Leakage Current
Enable (EN) Sink Current
V_IN = 5.5V, EN = GND or V_IN
EN = 0.3V
-3
0
3
µA
6.4
11
16.6
µA
SOFT-START
Soft-Start Source Current
SS = GND
20
23
27
µA
Soft-Start Discharge ON-Resistance
2.2
4.7
Ω
Soft-Start Discharge Time
256
Clock Cycles
POWER-GOOD SIGNAL
Rising Threshold
Rising Hysteresis
Falling Threshold
Falling Hysteresis
Power-Good Drive
Power-Good Leakage
PROTECTION FEATURES
V_FB as a % of V_REF, Test Mode
V_FB as a % of V_REF, Test Mode
V_FB as a % of V_REF, Test Mode
V_FB as a % of V_REF, Test Mode
V_IN = 3V, PGOOD = 0.4V, EN = GND
V_IN = PGOOD = 5.5V
107
111
115
%
2
3.5
5
%
85
89
93
%
2
3.5
5
%
7.3
8.2
mA
0.001
1
µA
Undervoltage Monitor
Undervoltage Trip Threshold
Undervoltage Recovery Threshold
Overcurrent Monitor
V_IN = 3V, V_FB as a % of V_REF, Test mode
V_IN = 3V, V_FB as a % of V_REF, Test mode
71
75
79
%
84
88
92
%
Overcurrent Trip Level
LX4 Power Block, Test Mode, (Note 7)
1.3
1.9
2.5
A
Overcurrent or Short-Circuit Duty-Cycle
V_IN = 3V, SS interval = 200µs, Test Mode, Fault
interval divided by hiccup interval
0.8
5
%
NOTES:
3. Typical values shown are not guaranteed. Guaranteed min/max values are provided in the SMD.
4. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
5. Limits do not include tolerance of external feedback resistors. The 0A to 6A output current range may be reduced by Minimum LXx On Time and
Minimum LXx Off Time specifications.
6. Limits established by characterization or analysis and are not production tested.
7. During an output short-circuit, peak current through the power block(s) can continue to build beyond the overcurrent trip level by up to 3A. With all six
power blocks connected, peak current through the power blocks and output inductor could reach (6 x 2.5A) + 3A = 18A. The output inductor must
support this peak current without saturating.
8
FN7956.0
November 30, 2011