RH1573K DICE
Low Dropout PNP
Regulator Driver
DESCRIPTION
The RH1573 is a regulator driver IC designed to provide a
solution for applications requiring high current, low dropout
and fast transient response. When driving an external PNP
power transistor, this device provides load current up to
5A with a dropout voltage as low as 0.35V. The RH1573
circuitry is designed for extremely fast transient response.
This greatly reduces bulk storage capacitance when the
regulator is used in applications with fast, high current
load transients. The RH1573 uses a time-delayed latching
overcurrent protection technique that requires no external
sense resistor. Base drive is limited for instantaneous
protection, and a time-delayed latch protects the regulator
from continuous short circuits.
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Pin Voltage (V
IN
to GND) .................................10V
Drive Pin Voltage (V
DRIVE
to GND) ............................10V
Output Pin Voltage (V
OUT
to GND) ............................10V
Shutdown Pin Voltage (V
SHDN
to GND) .....................10V
Operating Junction Temperature
Range ................................................ –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
rh1573kdicef
1
RH1573K DICE
TABLE 1: ELECTRICAL CHARACTERISTICS
PARAMETER
Reference Voltage
CONDITIONS
I
DRIVE
= 20mA, T
J
= 25°C
5mA < I
DRIVE
< 250mA, 3V < V
IN
< 7V, 1.5V < V
DRIVE
< 7V
Line Regulation (V
FB
)
Load Regulation (V
FB
)
FB Pin Bias Current
DRIVE Pin Current
DRIVE Pin Saturation Voltage
SHDN Pin Threshold Voltage
SHDN Pin Current
LATCH Pin Latch-Off Threshold
Voltage
LATCH Pin Charging Current
LATCH Pin Latching Current
V
IN
– V
OUT
Differential Threshold
for Latch Disable
Input Quiescent Current
Minimum Input Voltage for Bias
Operation
V
IN
= 7V
2.4
0.55
V
SHDN
= 5V
1
4
I
DRIVE
= 20mA, 3V < V
IN
< 7V
ΔI
DRIVE
= 20mA to 250mA
V
FB
= 1.265V
V
FB
= 1.35V, V
DRIVE
= 7V
V
FB
= 1.15V, V
DRIVE
= 1.5V
I
DRIVE
= 20mA, V
FB
= 1.15V
I
DRIVE
= 250mA, V
FB
= 1.15V
1
290
0.12
0.73
1.3
200
1.4
7
0.65
0.7
1.7
0.2
1.0
1.5
300
1.8
10
0.85
0.8
2.8
0.8
NOTES
2
2
0.17
2
18
4
1.2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2.8
0.4
0.8
2
1
230
0.3
1.4
1.6
350
2.3
14
0.85
1.1
3.5
MIN
1.252
(Preirradiation)
–55°C ≤ T
A
≤ 125°C
MIN
TYP
MAX
1.225
1.265
1.305
2
40
6
2
SUB-
GROUP
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
UNITS
V
V
mV
mV
μA
mA
mA
V
V
V
μA
V
μA
mA
V
mA
V
T
A
= 25°C
SUB-
TYP
MAX GROUP
1.265
1.278
1
TABLE 2: ELECTRICAL CHARACTERISTICS
PARAMETER
Reference Voltage
Line Regulation (V
FB
)
Load Regulation (V
FB
)
FB Pin Bias Current
DRIVE Pin Current
DRIVE Pin Saturation
Voltage
SHDN Pin Threshold
Voltage
SHDN Pin Current
V
SHDN
= 5V
CONDITIONS
I
DRIVE
= 20mA, T
J
= 25°C
I
DRIVE
= 20mA, 3V < V
IN
< 7V
I
DRIVE
= 20mA to 250mA
V
FB
= 1.265V
V
FB
= 1.35V, V
DRIVE
= 7V
V
FB
= 1.15V, V
DRIVE
= 1.5V
I
DRIVE
= 20mA, V
FB
= 1.15V
I
DRIVE
= 250mA, V
FB
= 1.15V
1
290
0.2
1
1.5
300
10KRAD(Si)
NOTES MIN MAX
2
2.1
19
4.2
1.3
(Postirradiation)
50KRAD(Si)
MIN MAX
2.5
22
5
1.7
285
0.21
1.02
1
1.5
300
1
0.23
1.05
1.52
300
1
275
0.25
1.1
1.55
300
1
100KRAD(Si) 200KRAD(Si)
MIN MAX MIN MAX
3
25
6
2.2
260
0.3
1.2
1.6
300
4
30
7
3
UNITS
V
mV
mV
μA
mA
mA
V
V
V
μA
20KRAD(Si)
MIN MAX
2.2
20
4.5
1.4
288
1.252 1.278 1.252 1.278 1.249 1.281 1.245 1.285 1.239 1.291
rh1573kdicef
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RH1573K DICE
TABLE 2: ELECTRICAL CHARACTERISTICS
PARAMETER
LATCH Pin Latch-Off
Threshold Voltage
LATCH Pin Charging
Current
LATCH Pin Latching
Current
V
IN
– V
OUT
Differential
Threshold for Latch
Disable
Input Quiescent Current
Minimum Input Voltage
for Bias Operation
V
IN
= 7V
2.4
0.5
CONDITIONS
10KRAD(Si)
NOTES MIN MAX
1
4.4
1.9
10
0.85
0.81
0.5
(Postirradiation)
50KRAD(Si)
MIN MAX
0.9
4.2
2.1
10.5
0.85
0.48
0.85
0.45
100KRAD(Si) 200KRAD(Si)
MIN MAX MIN MAX
0.8
4
2.2
11
0.85
0.9
0.4
0.8
4
2.2
11
0.85
1
UNITS
V
μA
mA
V
20KRAD(Si)
MIN MAX
1
4.4
2
10
0.85
0.82
2.8
2.4
2.8
2.4
2.85
2.4
2.9
2.4
3.1
mA
V
TABLE 3: POST BURN-IN ENDPOINTS AND DELTA LIMITS REQUIREMENTS
T
A
= 25°C
PARAMETER
Reference Voltage
DRIVE Pin Current
CONDITIONS
I
DRIVE
= 20mA, V
IN
= 5V
V
FB
= 1.15V, V
DRIVE
= 1.5v
ENDPOINT LIMITS
NOTES MIN
MAX
1.252
280
1.278
DELTA LIMITS
MIN
MAX
–0.005
–10
0.005
10
UNITS
V
mA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Operating conditions are limited by maximum junction
temperature. The regulated feedback or output voltage specification will
not apply for all possible combinations of input voltage, drive voltage and
drive current. When operating at maximum drive current, the drive voltage
range must be limited. When operating at maximum input and drive
voltage, the drive current must be limited.
rh1573kdicef
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
3
RH1573K DICE
TABLE 4: ELECTRICAL TEST REQUIREMENTS
MIL-STD-883 TEST REQUIREMENTS
Final Electrical Test Requirements (Method 5004)
Group A Test Requirements (Method 5005)
Group B and D for Class S,
End Point Electrical Parameters (Method 5005)
*PDA applies to subgroup 1. See PDA Test Notes.
SUBGROUP
1*,2,3
1,2,3
1,2,3
PDA Test Notes
The PDA is specified as 5% based on failures from group A, subgroup 1,
tests after cooldown as the final electrical test in accordance with method
5004 of MIL-STD-883. The verified failures of group A, subgroup 1, after
burn-in divided by the total number of devices submitted for burn-in in that
lot shall be used to determine the percent for the lot.
Linear Technology Corporation reserves the right to test to tighter limits
than those given.
TOTAL DOSE BIAS CIRCUIT
RH1573K
W10
FB
LATCH
SHDN
COMP
V
OUT
V
IN
DRIVE
RH1573 BIAS
NC
NC
7V
20mA
340Ω
GND
1μF
I.D. No. 66-10-1573
rh1573kdicef
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
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●
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