IRF IRUH50PA23A1M

PD-97032A
IRUH50PA23A1M
Ultra Low Dropout
Positive Adjustable Linear Regulator
Product Summary
+5.0Vin at 3.0A
Part Number
Dropout
IO
Vin
Vout
IRUH50PA23A1M
0.4V
3.0A
5.0V
1.265V To (VIN - 0.4V)
8-LEAD FLAT PACK
Features:
The IRUH50PA23A1M is a space qualified, ultra low
dropout linear regulator designed specifically for space
applications. This product has been characterized to a total
ionizing dose of 1.0Mrad(Si) per MIL-STD-883, Method
1019 at both high and low dose rates under biased and
unbiased conditions to account for ELDRS effects in bipolar
devices. The ultra low dropout voltage of 0.4V @ 3A makes
the part particularly useful for applications requiring low
noise and higher efficiency.
n
n
n
n
n
n
n
n
Total dose to 1.0Mrad(Si) and low dose
capability to 500 Krad(Si) allows use in
space applications
Single Event latchup Immune
LET = 84 MeV/(mg/cm2)
Fluency = 1 x 109 Ions/cm2
Low noise, higher efficiency
Ultra low dropout voltage of [email protected] 3A out
significantly reduces power consumption
Remote shutdown permits power
sequencing to be easily implemented
Hermetic 8-lead flat pack ensures higher
reliability
Space Level Screened
This part is also available in MO-078 Package
as IRUH50PA23B1M
Absolute Maximum Ratings
Parameter
Output Current
Input Voltage
Symbol
Value
Units
IO
3.5
A
VIN
7.0
Output Voltage
Power Dissipation, TC = 25°C
VOUT
PTOT
1.265V To (VIN - 0.4V)
19
W
Thermal Resistance, Junction to Case
RTHJC
6.5
°C/W
Operating Temperature Range
TJ
-55 to +125
Storage Temperature Range
TS
TL
-65 to +150
Lead Temperature
www.irf.com
V
°C
300
1
01/09/06
IRUH50PA23A1M
Pre-Radiation
Electrical Characteristics @TC = 25°C (Unless Otherwise Specified)
Parameter
Test Conditions
Symbol
Min.
Typ.
Max.
VIN
4.5
-
6.5
4.5V ≤ VIN ≤ 5.5V, IO = 50mA
VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A
VREF
VLINE
VLOAD
1.252
-0.25
1.265
-
1.278
+0.25
VDROP
ILATCH
-
1.0
IO = 3.0A, VOUT = 2.5V
VIN = 5.0V, Overcurrent Latchup
-1.0
-
0.4
%/A
V
3.0
65
-
-
dB
1.0
200
-
1.6
-0.1
-
+0.1
Min.
Typ.
Input Voltage Range - Operating IO = 3.0A
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Ripple Rejection
Shutdown Source Current
Shutdown Pin Threshold
Output Voltage at Shutdown
F = 120Hz, IO = 50mA
VSHDN = 5.0V
ISHDN
VIN = 5.0V
VSHDN
VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN)
Units
V
%/V
A
µA
V
Pre-Radiation
Electrical Characteristics @TC = -55°C to +125°C
Parameter
Test Conditions
Input Voltage Range - Operating IO = 3.0A
Reference Voltage
Line Regulation
4.5V ≤ VIN ≤ 5.5V, IO = 50mA
Symbol
Max. Units
VIN
4.5
-
6.5
VREF
VLINE
1.225
-0.5
1.265
-
1.305
+0.5
V
%/V
VLOAD
-2.0
-
2.0
Dropout Voltage
VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A
IO = 3.0A, VOUT = 2.5V
VDROP
-
-
0.4
Current Limit
VIN = 5.0V, Overcurrent Latchup
ILATCH
3.0
-
-
A
Ripple Rejection
F = 120Hz, IO = 50mA
65
-
-
dB
Shutdown Source Current
VSHDN = 5.0V
ISHDN
-
200
-
µA
Shutdown Pin Threshold
VIN = 5.0V
VSHDN
1.0
-
1.6
Output Voltage at Shutdown
VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN)
-0.1
-
+0.1
Load Regulation
%/A
V
V
For notes, please refer to page 3
2
www.irf.com
IRUH50PA23A1M
Post-Radiation
Electrical Characteristics @TC = 25°C (Unless Otherwise Specified)
Parameter
Test Conditions
Line Regulation
4.5V ≤ VIN ≤ 5.5V, IO = 50mA
Load Regulation
Current Limit
VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A
Ripple Rejection
Output Voltage at Shutdown
VIN = 5.0V
F = 120Hz, IO = 50mA
Symbol
Min.
Typ.
Max.
Units
VLINE
VLOAD
-0.5
-
+0.5
%/V
-2.0
3.0
-
2.0
-
%/A
A
40
-
-
dB
-0.1
-
+0.1
V
IMAX
VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN)
Notes for Electrical Characteristic Tables
 VShutdown ramp from 0.8V to 4.8V, output monitored for a 100mV drop below the nominal specification for Vout
www.irf.com
3
IRUH50PA23A1M
Pre-Radiation Characteristics
OMR9601 Ripple Rejection vs. Frequency
3A
120
1.5A
100
.75A
.50A
(db)
80
60
40
20
0
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)
Fig 1. Ripple Rejection Vs Frequency
Radiation Performance Characteristics
Test
Conditions
Min
Typ
Unit
MIL-STD-883, Method 1019
Total Ionizing Dose (Gamma)
Operating Bias applied during exposure
Krads (Si)
1,000
Full Rated Load, Vin=5.0V
Neutron Fluence
MIL-STD-883, Method 1017
Single Event effects
Heavy Ions (LET)
SEU, SEL, SEGR, SEB
Operating Bias applied during exposure
1.00E+09
84
1.00E+13
Neutrons/cm
2
2
MeV*cm /mg
Full Rated Load, Vin=5.0V
4
www.irf.com
IRUH50PA23A1M
Vin
Vout
Vin
ADJUST
RESISTOR
Vout
R1
IRUH50PA23A1M
100uF 16V
Tantalum
SHDN
1.0uFX10
CeramicX7R
GND
1000uF 6.3V
Low ESR Tantalum
Ground
Vout = Vref X ( 1+ R1/1000 )
Fig 2. Typical Application Circuit
Input Capacitance
Recommended input capacitance for a generic application is a 100µF, 16V tantalum capacitor. However, the
input capacitance is not critical to the stability of the regulator and is therefore application dependant. In
designs with a clean bus voltage that is situated close to the input of the regulator, only a small ceramic
capacitor will be needed to decouple high frequency noise. On the other hand , in designs with a noisy bus,
a larger capacitor will be needed. Care should be taken to ensure that the input to the regulator is sufficiently
free of noise and disturbances.
Output Capacitance
Like most ultra low dropout voltage regulators, IRUH50PA23A1M requires the use of output capacitors as
part of the device frequency compensation. The device requires a minimum of 220µF tantalum to ensure
stability.
Many different types of capacitor are available and have widely varying characteristics. These capacitors
differ in capacitor tolerance, equivalent series resistance (ESR), equivalent series inductance and capacitance
temperature coefficient. The IRUH50PA23A1M frequency compensation optimizes frequency response with
low ESR capacitors. In general, use capacitors with an ESR of less than 50mΩ for heavy load applications.
High quality bypass capacitors must be also be used to limit the high frequency noise generated by the load.
Multiple small ceramic capacitors are typically required to limit parasitic inductance (ESL) and ESR in the
capacitors to acceptable levels.
The upper limit of the capacitance is governed by the delayed over-current latch function of the regulator. The
regulator has a protection circuit that will latch the device off in the event of a short circuit. However, since it is
known that the regulator will draw a large in-rush current upon startup, the latch-off is delayed by about 10ms
to allow the outout capacitors to charge to a steady state without shutting down. During this period, the
regulator will have an output current at its maximum of around 5A typical. Therefore, the maximum output
capacitance can be as high as 20,000µF without causing device to latch-off during start-up.
www.irf.com
5
IRUH50PA23A1M
Vout
Vin
Drive
Shutdown
Adjust
G nd
Ground
Fig 3. Simplified Schematic Circuit
Space Level Screening Requirements
TEST/INSPECTION
SCREENING LEVEL
MIL-STD-883
SPACE
METHOD
Pre Seal Burn-In
Optional
1030
Nondestructive Bond Pull
100%
2023
2017
Internal Visual
100%
Temperature Cycle
100%
1010
Constant Acceleration
100%
2001
Mechanical Shock
100%
2002
2020
PIND
100%
Pre Burn-In-Electrical
100%
Burn-In
100%
Final Electrical
100%
1015
Seal
100%
1014
Radiographic
External Visual
100%
100%
2012
2009
Note:
International Rectifier doesnot currently have a DSCC certified Radiation Hardness Assurance Program
6
www.irf.com
IRUH50PA23A1M
Case Outline and Dimensions - 8-Lead Flat Pack
Pin Assignment
Pin #
Pin Description
1
GND
2
GND
3
SHUTDOWN
4
5
ADJUST
VOUT
6
VOUT
7
Vin
8
Vin
Note:
1) All dimensions are in inches
Part Numbering Nomenclature
IR
Linear Regulator Module
U = Ultra Low Dropout Regulator
Radiation Hardening
U
H
50
P
A2
3
A
1M
P
Screening
P = Unscreened, 25°C
Electrical Test ( Not for Qual)
K = Space Level Screening
H = RAD Hardened or Tolerant
RAD Level
Input Voltage
1M = 1M Rads
50 = 5.0V
Package Code
Polarity
A = 8 Lead Flat Pack
P = Positive
Output Voltage
A2 = Adjustable 2.5V to 4.6V
Maximum Output Current
3 = 3.0 Amp
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
IR LEOMINSTER : 205 Crawford St., Leominster, Massachusetts 01453, USA Tel: (978) 534-5776
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 01/2006
www.irf.com
7