ISL70002SEH Datasheet, PDF (10/23 Pages) Intersil Corporation – Rad Hard and SEE Hard 12A Synchronous Buck Regulator with Multi-Phase Current Sharing

ISL70002SEH
Electrical Specifications Unless otherwise noted, V_IN = AVDD = DVDD = PVINx = EN = FSEL = M/S = SC0 = SC1= 3V to 5.5V;
GND = AGND = DGND = PGNDx = ISHx = ISHCOM = ISHEN = ISHREFx = ISHSL = TDI = TDO = TPGM = 0V; FB = 0.65V; PORSEL = V_IN for 4.5V ≤
V_IN ≤ 5.5V and GND for V_IN < 4.5V; LXx = SYNC = Open Circuit; OCx is connected to OCSSx with a 10kΩ resistor; OCx is connected to GND with
a 4.99kΩ resistor shunted by a 6.8nF capacitor; PGOOD is pulled up to V_IN with a 1kΩ resistor; REF is bypassed to GND with a 220nF capacitor;
SS is bypassed to GND with a 100nF capacitor; T_A = T_J = -55°C to +125°C; Post 100krad(Si). (Note 6). (Continued)
PARAMETER
TEST CONDITIONS
MIN
(Note 10) TYP
MAX
(Note 10)
UNITS
Enable (EN) Sink Current
EN = 0.3V
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
%
7.2
mA
1
µA
Undervoltage Monitor
Undervoltage Trip Threshold
Undervoltage Recovery Threshold
Overcurrent Monitor
V_FB as a % of V_REF, Test mode
V_FB as a % of V_REF, Test mode
71
75
79
%
84
88
92
%
Overcurrent Trip Level
CURENT SHARE
I_OCx = 60µA, Test mode (Note 14)
I_OCx = 240µA, Test mode (Note 14)
5.35
23
7.35
A
26
A
Slave Load Current
Master Load Current = 12A, V_IN = 3.3V, V_OUT = 0.8V,
7
12
17
A
SC1 = ISHSL = M/S = 0, SC0 = ISHEN = FSEL = 1,
SYNC = 1MHz External, 500nH inductor (Notes 12, 13)
Master Load Current = 12A, V_IN = 3.3V, V_OUT = 1.8V,
7
12
17
A
SC0 = ISHSL= M/S = 0, SC1 = ISHEN = FSEL = 1,
SYNC = 1MHz External, 500nH inductor (Notes 12, 13)
Master Load Current = 12A, V_IN = 5.0V, V_OUT = 1.8V,
7
12
17
A
SC0 = ISHSL = M/S = 0, SC1 = ISHEN = FSEL = 1,
SYNC = 1MHz External, 500nH inductor (Notes 12, 13)
Master Load Current = 12A, V_IN = 5.0V, V_OUT = 2.5V,
7
12
17
A
ISHSL = M/S = 0, SC0 = SC1 = ISHEN = FSEL = 1,
SYNC=1MHz External, 500nH inductor (Notes 12, 13)
ISHx, ISHREFx, Tri-State Leakage Current
Master ISHCOM Pull-Up Resistance
V_IN = 5.5V, EN = GND
ISHCOM = -50µA
-1
0
6.5
10
1
µA
13
kΩ
Slave ISHCOM Input Leakage Current
Slave ISHCOM Pull-Down Resistance
Slave ISHCOM Input High Voltage
Slave ISHCOM Input Low Voltage
Slave ISHCOM Input Voltage Hysteresis
V_IN = ISHSL = 5.5V
ISHSL = V_IN, EN = GND, ISHCOM = 7.2mA
ISHSL = V_IN
ISHSL = V_IN
ISHSL = V_IN
-1
1
µA
35
75
125
Ω
42
52
26
36
7
16
62
% of V_IN
46
% of V_IN
24
% of V_IN
10
FN8264.1
April 5, 2012