DATASHEET
ISL75052SEH, ISL73052SEH
1.5A, Radiation Hardened, Positive, High Voltage LDO
FN8456
Rev.8.01
Mar 19, 2020
The ISL75052SEH and ISL73052SEH are radiation hardened,
single output LDOs specified for an output current of 1.5A. The
devices operate from an input voltage range of 4.0V to 13.2V
and provide for output voltages of 0.6V to 12.7V. The output is
adjustable based on a resistor divider setting. Dropout
Features
• DLA SMD 5962-13220
• Input supply range 4.0V to 13.2V
• Output current up to 1.5A at T = +150°C
J
voltages as low as 75mV (at 0.5A) typical can be realized using
the devices. This allows you to improve the system efficiency
• Best in class accuracy ±1.5%
- Over line, load, and temperature
• Ultra low dropout:
by lowering V to nearly V
.
IN OUT
The ENABLE feature allows the part to be placed into a low
shutdown current mode of 165µA (typical). When enabled, the
device operates with a low ground current of 11mA (typical),
which provides for operation with low quiescent power
consumption.
- 75mV dropout (typical) at 0.5A
- 225mV dropout (typical) at 1.5A
• Noise of 100µV
(typical) between 300Hz to 300kHz
RMS
• SET mitigation with no added filtering/diodes
• Shutdown current of 165µA (typical)
• Externally adjustable output voltage
• PSRR 65dB (typical) at 1kHz
These devices have superior transient response and are
designed keeping single event effects in mind. This results in
reduction of the magnitude of SET seen on the output. There is
no need for additional protection diodes and filters.
A COMP pin is provided to enable the use of external
compensation. This is achieved by connecting a resistor and
capacitor from COMP to ground. The device is stable with
tantalum capacitors as low as 47µF (KEMET T525 series) and
provides excellent regulation all the way from no load to full
load. The programmable soft-start allows you to program the
inrush current by means of the decoupling capacitor used on
the BYP pin. The OCP pin allows the short-circuit output current
limit threshold to be programmed by means of a resistor from
OCP pin to GND. The OCP setting range is from 0.16A
minimum to 3.2A maximum. The resistor sets the constant
current threshold for the output under fault conditions. The
thermal shutdown disables the output if the device
• ENable and PGood feature
• Programmable soft-start/inrush current limiting
• Adjustable overcurrent protection
• Over-temperature shutdown
• Stable with 47µF minimum tantalum capacitor
• Radiation acceptance testing - ISL75052SEH
- High dose rate (50-300rad(Si)/s). . . . . . . . . . . 100krad(Si)
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . .50krad(Si)
• Radiation acceptance testing - ISL73052SEH
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . .50krad(Si)
temperature exceeds the specified value. It subsequently
enters an ON/OFF cycle until the fault is removed.
• SEE hardness (see SEE report for details)
2
- No SEB/SEL LET . . . . . . . . . . . . . . . . . . .86MeV•cm /mg
TH
2
Applications
• LDO regulator for space power systems
• DSP, FPGA, and µP core power supplies
• Post regulation of SMPS and down-hole drilling
- SET (V
OUT
within ±5% During Events) . .86MeV•cm /mg
Related Literature
For a full list of related documents, visit our web page:
• ISL75052SEH, ISL73052SEH device pages
EN
0.30
ISL7x052SEH
VIN
0.25
0.20
0.15
0.10
0.05
0.00
+150°C
VIN
VOUT 1, 2
3, 4, 5
+125°C
200µF 0.1µF
16
8
BYP
OCP
VCCX
PG
ADJ
EN
VOUT
2.5V
15
14
13
12
+25°C
9
GND
COMP
0.1µF 200µF
10
15.8k
4.87k
2.2k
2.2n
0.1µF 0.1µF 300
22k
VIN
1nF
22k
0
0.5
1.0
1.5
2.0
PG
I
(A)
LOAD
FIGURE 2. DROPOUT vs I
FIGURE 1. TYPICAL APPLICATION
OUT
FN8456 Rev.8.01
Mar 19, 2020
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