ISL70001SRH_11 Datasheet, PDF (8/16 Pages) Intersil Corporation – Radiation Hardened and SEE Hardened 6A Synchronous Buck Regulator

ISL70001SRH
Electrical Specifications Unless otherwise noted, V_IN = AVDD = DVDD = PVINx = EN = M/S = 3V or 5.5V; GND = AGND = DGND =
PGNDx = TDI = TDO = ZAP = 0V; FB = 0.65V; PORSEL = V_IN for 4.5V ≤ V_IN ≤ 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) (Continued)
PARAMETER
TEST CONDITIONS
MIN
(Note 4) TYP
MAX
(Note 4)
UNITS
POWER-ON RESET
POR Select (PORSEL)
Input High Threshold
1.4
V
Input Low Threshold
1.2
V
POR Select (PORSEL) Input Leakage
Current
V_IN = 5.5V, PORSEL = GND or V_IN
0
µA
VIN POR
Rising Threshold, PORSEL = V_IN
Hysteresis, PORSEL = V_IN
Rising Threshold, PORSEL = GND
4.25
V
325
mV
2.8
V
Hysteresis, PORSEL = GND
175
mV
Enable (EN) Input Voltage
Rising/Falling Threshold
0.6
V
Enable (EN) Input Leakage Current
Enable (EN) Sink Current
V_IN = 5.5V, EN = GND or V_IN
EN = 0.3V
0
µA
11
µA
SOFT-START
Soft-Start Source Current
SS = GND
23
µA
Soft-Start Discharge ON-Resistance
2.2
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
111
%
3.5
%
89
%
3.5
%
8.2
mA
0.001
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
75
%
88
%
Overcurrent Trip Level
LX4 Power Block, Test Mode, (Note 7)
1.9
A
Overcurrent or Short-Circuit Duty-Cycle
V_IN = 3V, SS interval = 200µs, Test Mode, Fault
0.8
%
interval divided by hiccup interval
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
FN6947.1
May 23, 2011