DATASHEET
ISL75052SEH, ISL73052SEH
FN8456
Rev.8.01
1.5A, Radiation Hardened, Positive, High Voltage LDO
Mar 19, 2020
The ISL75052SEH and ISL73052SEH are radiation hardened,
Features
single output LDOs specified for an output current of 1.5A. The
DLA SMD 5962-13220
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
Input supply range 4.0V to 13.2V
adjustable based on a resistor divider setting. Dropout
Output current up to 1.5A at T = +150C
J
voltages as low as 75mV (at 0.5A) typical can be realized using
Best in class accuracy 1.5%
the devices. This allows you to improve the system efficiency
by lowering V to nearly V .
- Over line, load, and temperature
IN OUT
Ultra low dropout:
The ENABLE feature allows the part to be placed into a low
- 75mV dropout (typical) at 0.5A
shutdown current mode of 165A (typical). When enabled, the
device operates with a low ground current of 11mA (typical),
- 225mV dropout (typical) at 1.5A
which provides for operation with low quiescent power
Noise of 100V (typical) between 300Hz to 300kHz
RMS
consumption.
SET mitigation with no added filtering/diodes
These devices have superior transient response and are
Shutdown current of 165A (typical)
designed keeping single event effects in mind. This results in
reduction of the magnitude of SET seen on the output. There is
Externally adjustable output voltage
no need for additional protection diodes and filters.
PSRR 65dB (typical) at 1kHz
A COMP pin is provided to enable the use of external
ENable and PGood feature
compensation. This is achieved by connecting a resistor and
Programmable soft-start/inrush current limiting
capacitor from COMP to ground. The device is stable with
tantalum capacitors as low as 47F (KEMET T525 series) and
Adjustable overcurrent protection
provides excellent regulation all the way from no load to full
Over-temperature shutdown
load. The programmable soft-start allows you to program the
Stable with 47F minimum tantalum capacitor
inrush current by means of the decoupling capacitor used on
the BYP pin. The OCP pin allows the short-circuit output current
Radiation acceptance testing - ISL75052SEH
limit threshold to be programmed by means of a resistor from
- High dose rate (50-300rad(Si)/s). . . . . . . . . . . 100krad(Si)
OCP pin to GND. The OCP setting range is from 0.16A
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . .50krad(Si)
minimum to 3.2A maximum. The resistor sets the constant
current threshold for the output under fault conditions. The
Radiation acceptance testing - ISL73052SEH
thermal shutdown disables the output if the device
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . .50krad(Si)
temperature exceeds the specified value. It subsequently
SEE hardness (see SEE report for details)
enters an ON/OFF cycle until the fault is removed.
2
-No SEB/SEL LET . . . . . . . . . . . . . . . . . . .86MeVcm /mg
TH
2
Applications
-SET (V within 5% During Events) . .86MeVcm /mg
OUT
LDO regulator for space power systems
Related Literature
DSP, FPGA, and P core power supplies
For a full list of related documents, visit our web page:
Post regulation of SMPS and down-hole drilling
ISL75052SEH, ISL73052SEH device pages
EN
0.30
ISL7x052SEH
VIN
0.25
+150C
VIN VOUT 1, 2
3, 4, 5
+125C
200F 0.1F
16 BYP ADJ
15 VOUT
0.20
2.5V
8 OCP EN 14
+25C
9 VCCX GND 0.15
13
0.1F 200F
10 PG COMP 12
15.8k
2.2k
0.10
0.1F 0.1F 300
2.2n
22k
0.05
VIN
4.87k
1nF
0.00
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 Page 1 of 20
Mar 19, 2020
DROPOUT (V)ISL75052SEH, ISL73052SEH
Block Diagram
COMP
3.8V
VIN
LDO
OCP
VCCX
CURRENT
LIMIT
+
600mV
REFERENCE
BYP
BIAS
-
VOUT
POWER
PDMOS
THERMAL
SHUTDOWN
EN UVLO
ADJ
PG
-
DELAY
540mV
+
GND
FIGURE 3. BLOCK DIAGRAM
Typical Application
EN
ISL7x052SEH
1
VOUT BYP 16
0.1F
2 VOUT ADJ
15
3 VIN EN 14
VIN
4 VIN GND 13
VCCX
5 VIN COMP 12
22k 10k
0.1F
100F 100F
1nF
NC GND 11 PG
6
7 NC PG 10
VOUT = 2.5V
300
8 OCP VCCX 9
15.8k
2.2k 0.1F 100F 100F
NC = NO CONNECT PIN CAN BE 2.2nF
CONNECTED TO EITHER VIN OR GND
4.87k
0.1F
FIGURE 4. TYPICAL APPLICATION
FN8456 Rev.8.01 Page 2 of 20
Mar 19, 2020