ETC GM317TA3T

A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
Features
Description
Output current up to 1.5A
The GM317 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5 A over an out-
Output Voltages 1.2V to 37V
Input Regulation typ. 0.01% per input
put voltage range of 1.2 V to 37 V. This voltage regulator is
Output Regulation typ. 0.1%
exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal
current limiting, thermal shutdown and safe area compen-
Peak Output Current Constant over
Temperature Range of Regulator
Available in TO-220 and TO-263 Packages
sation, making it essentially blow-out proof.
Ripple Rejection Typically 80dB
Direct replacements for LM317
The GM317 a wide variety of applications including local,
application, and on card regulation. This device can also
be used to make a programmable output regulator, or by
connecting a fixed resistor between the adjustment and output. The GM317 can be used as a precise current regulator.
TYPICAL APPLICATION
VIN
GM317
VOUT
VIN
ADJ
CIN*
0.1µF
IADJ
VOUT
R1
240W
+ C **
O
1µF
* CIN is required if regulator is located an appreciable distance from power supply filter.
**CO is not needed for stability, however, it improve transient response.
VOUT= 1.25V (1+
R2
) + IADJR2
R1
Since IADJ is controlled to less than 100µA, the error associated with this term is negligible
in most applications.
www.gammamicro.com
PRELIMINARY
GM317 V0.1
R2
1
A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
MARKING INFORMATION & PIN CONFIGURATIONS
2
TO-220
TO-263-2 (D PAK)
GM317
GM317
AYWW
AYWW
ADJ
INPUT
OUTPUT
INPUT
ADJ
OUTPUT
A : Assembly Location
Y : Year
W W : weekly
ORDERING INFORMATION
Ordering Number
Package
GM317TA3T
TO-263
50 Units / Tube
GM317TA3R
TO-263
800 Units / Tape & Reel
GM317TB3T
TO-220
50 Units / Tube
GM317
* For detail Ordering Number identification, please see last page.
2
Shipping
A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
ABSOLUTE MAXIMUM RATINGS
VALUE
UNIT
Input to Output Differential Voltage, VI - VO
40
V
Continuous Total Dissipation at 25°C free-air temperature
2
Continuous Total Dissipation at (or bellow) 25°C case temperature
15
PARAMETER
W
Operating free-air, case, or virtual junction Temperature Range
0 to +125
Storage Temperature Range
-65 to +150
Lead Temperature 1.6mm (1/16 inch) from case for 10 sec.
°C
260
RECOMMENDED OPERATING CONDITIONS
MIN
MAX
UNIT
Output Current, IO
10
1500
mA
Operating virtual junction temperature, TJ
0
125
°C
PARAMETER
SCHEMATIC DIAGRAM
VIN
230
120
5.6K
6.3V
13K
170
125K
12.4K
6.7K
5pF
135
510
6.8K
5.1K
30
pF
5.8K
6.3V
190
110
30
pF
2.4K
12K
6.3V
160
200
105
4.0
12.5K
3.6K
VOUT
ADJ
This device contains 29 active transistors.
GM317
310
31
3
A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
ELECTRICAL CHARACTERISTICS
over recommended ranges of operating virtual junction temperature, unless otherwise noted.
PARAMETER
TEST CONDITIONS*
Input Regulation
(Note 2)
VI - VO= 3V to 40V TJ= MIN to MAX
(Note 3)
IO= 10mA to 1.5A
Min
Output Regulation
Max
0.01
0.04
0.02
0.07
65
VO= 10V, f= 120H,
10µF capacitor between ADJ and
ground
IO= 10mA to 1.5A
TJ= 25°C (Note 3)
VO
IO= 10mA to 1.5A
(Note 3)
dB
66
5V
80
5
25
mV
VO >5V
0.1
0.5
%
VO
5V
20
70
mV
VO >5V
0.3
1.5
%
Output Voltage Change with Temperature TJ= MIN to MAX
After 1000h at
TJ= MAX and VI - VO= 40V
0.3
Output Noise Voltage
f= 10Hz to 10kHz, TJ= 25°C
0.003
Minimum Output Current to maintain
Regulation
VI - VO= 40V
Reference Voltage (Output to ADJ)
VI - VO= 3V to 40V,
IO= 10mA to 1.5A, P
Peak Output Current
15W
1
%
%
3.5
10
mA
50
100
µA
0.2
5.0
µA
1.2
1.25
1.3
V
Adjustment-Termainal Current
VI - VO= 2.5V to 40V,
IO= 10mA to 1.5A
%
1
Output Voltage Long-Term Drift (Note 4)
Adjustment-Termainal Current Change
Unit
%/ V
VO= 10V, f= 120H
Ripple Rejection
Typ
VI - VO
15V
1.5
2.2
VI - VO
40V, TJ= 25°C
0.15
0.4
A
* Unless otherwise noted, these specifications apply for the following test conditions: VI - VO = 5V and IO= 0.5A.
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
GM317
Note 1: All characteristics are measured with a 0.1µF capacitor across the input and a 1µF capacitor across the output.
Note 2: Input regulation is expressed here as the percentage change in output voltage per 1V change at the input.
Note 3: Pulse testing techniques are used to mantain the junction temperature as close to the ambient temperature as possible.
Thermal effects must be taken into account separately.
Note 4: Since long-term drift cannot be measured on the individual devices prior to shipment, this specification is not intended to
be a guarantee or warranty. It is an engineering estimate of the average drift to be expected from lot to lot.
4
A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
Typical Performance Characteristics
100
90
IL= 0.5A
0
-0.2
IL= 1.5A
-0.4
-0.6
-0.8
-1.0
VIN= 15V
VOUT= 10V
-50 -25
Adjustment Pin Current (µA)
0.2
IOUT, Output Current (A)
3.0
TJ= 25°C
2.0
150°C
-55°C
1.0
80
70
60
50
40
30
20
10
0
0
0
0 25 50 75 100 125 150
0
TJ, Junction Temperature (°C)
Figure 1. Load Regulation
10
20
30
VIN - VOUT, Input - Output
Voltage Differential(Vdc)
40
2.5
1.0A
2.0
500mA
1.5
200mA
20mA
TJ, Junction Temperature (°C)
Figure 4. Dropout Voltage
RR, Ripple Rejection (dB)
80
60
3.5
3.0
25°C
2.5
150°C
2.0
1.5
1.0
125
CADJ= 10µA
Without CADJ
60
40
VIN - VOUT= 5V
20 IL= 500mA
f= 120Hz
TJ= 25°C
0
0
-50 -25 0 25 50 75 100 125 150
100
80
0.5
1.0
100
TJ= -55°C
4.0
RR, Ripple Rejection (dB)
IL= 1.5A
72
100
4.5
IB, Quiescent Current (mA)
VIN - VOUT, Input - Output
Voltage Differential (Vdc)
5.0
DVOUT= 100mV
50
Figure 3. Adjustment Pin Current
vs. Temperature
Figure 2. Current Limit
3.0
25
Ambient Temperature (°C)
0
10
20
30
40
VIN - VOUT, Input - Output
Voltage Differential (Vdc)
Figure 5. Minimum Operating Current
0
5.0
10
15
20
25
30
35
40
VOUT, Output Voltage (V)
Figure 6. Ripple Rejection versus
Output Voltage
IL= 500mA
VIN= 15V
VOUT= 10V
TJ= 25°C
40
20
0
10
CADJ= 10µF
Without CADJ
100 1.0k 10k 100k 1.0M 10M
f, Frequency (Hz)
Figure 7. Ripple Rejection
Versus Frequency
GM317
DVOUT, Output Voltage Change (%)
4.0
0.4
5
A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
Basic Circuit Operation
The GM317 is a 3- terminal floating regulator. In opera-
External Capacitors
A 0.1µF disc or 1.0µF tantalum input bypass capaci-
tion, the GM317 develops and maintains a nominal
tor (CIN) is recommended to reduce the sensitivity to
1.25V reference (Vref) between its output and adjust-
input line impedance.
ment terminals. This reference voltage is converted to
a programming current flows through R2 to ground.
The adjustment terminal may be bypassed to
ground to improve ripple rejection. This capacitor
The regulated output voltage is given by:
(CADJ) prevents ripple from being amplified as the
R2
VOUT= Vref (1+
) + IADJ R2
R1
output voltage is increased. A 10µF capacitor should
Since the current from the adjustment terminal (IADJ)
improve ripple rejection about 15 dB at 120Hz in a
10V application.
represents an error term in the equation, the GM317
was designed to control IADJ to less than 100µA and
keep it constant. To do this, all quiescent operating current is returned to the output terminal. This imposes
Although the GM317 is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can cause excessive ringing. An
the requirement for a minimum load current. If the load
output capacitance (CO) in the form of a 1.0µF tanta-
current is less than this minimum, the output voltage
lum or 25µF aluminum electrolytic capacitor on the
will rise.
output swamps this effect and insures stability.
Since the GM317 is a floating regulator, it is only the
Protection Diodes
When external capacitors are used with any IC regu-
voltage differential across the circuit which is important
to performance, and operation at high voltages with respect to ground is possible.
VIN
GM317
lator it is sometimes necessary to add protection diodes to prevent the capacitors from discharging
through low current points into the regulator.
VOUT
VOUT
Figure 9. shows the GM317 with the recommended
protection diodes for output for output voltage in ex-
Vref
Adjust
R1
IPROG
IADJ
cess of 25Vor high capacitance values (CO > 25µF,
CADJ > 10µF). Diode D1 prevents CO from discharging thru the IC during an input short circuit. Diode D2
R2
VOUT
Vref= 1.25V Typical
Figure 8. Basic Circuit Configuration
Load Regulation
The GM317 is capable of providing extremely good
protects against capacitor CADJ discharging through
the IC during an output short circuit.
The combination of diodes D1 and D2 prevents
CADJ from discharging through the IC during an input short circuit.
D1
load regulation, but a few precautions are needed to ob-
GM317
tain maximum performance. For best performance, the
programming resistor (R1) should be connected as
1N4002
VIN
GM317
close to the regulator as possible to minimize line
R1
drops which effectively appear in series with the reference, thereby degrading regulation. The groung end of
R2 can be returned near the load ground to provide remote ground sensing and improve load regulation.
VOUT
CIN
Adjust
R2
D2 + C
O
1N4002
CADJ
6
Figure 9. Voltage Regulator with Protection Diodes
A
Power Management
GM317
A
MICROELECTRONICS
3- TERMINAL ADJUSTABLE REGULATOR
TO-263-2 PACKAGE OUTLINE DIMENSIONS
9.90 ± 0.20
4.50 ± 0.20
+0.1
1.30 -0.05
15°
0.40
1.20
Pad Layout
3°
1.50 DP0.20
0.63
17.02
0.33
8.38
9.20 ± 0.20
15.3 ± 0.20
0.10 ± 0.01
P
3°
3°
1.4 ± 0.20
R0.30
2.40 ± 0.20
2.00 ± 0.10
4.90 ± 0.20
0.90 ± 0.10
1.27 ± 0.10
2.54 TYP
(2.54 ± 0.20)
0.42
10.66
0.24
6.096
2.54 ± 0.10
0.75
R0.30
+0.1
0.50 -0.05
0.04
1.016
10.0 ± 0.20
7.0
4.0
0.40
3°
(
0.90
3°
R 0.3
0.12
3.05
R 0.45
Inches
)
mm
7.2
9.20 ± 0.20
10.00 ± 0.20
4.90 ± 0.20
Unit: mm
TO-220-3 PACKAGE OUTLINE DIMENSIONS
4.50 ± 0.20
9.90 ± 0.20
3.60 ± 0.20
8.0
8.70
2.80 ± 0.10
7.0
+0.1
1.30 -0.05
8.40
P
3°
45°
3.00
1.27 ± 0.10
10.08 ± 0.30
13.08 ± 0.20
1.46
1.00
2.54 TYP
(2.54 ± 0.20)
3°
3°
0.80 ± 0.10
1.52 ± 0.10
0.9
7.0
3°
3-R0.2
GM317
4.60
18.95 MAX
3.70 ± 0.20
15.90 ± 0.20
1.50 DP0.20
9.20 ± 0.20
1.30 ± 0.10
1.70
+0.1
0.50 -0.05
2.40 ± 0.20
3°
2 - R 0.3
7
Unit: mm
10.00 ± 0.20
A
A
MICROELECTRONICS
Power Management
GM317
3- TERMINAL ADJUSTABLE REGULATOR
ORDERING NUMBER
GM 317 TA3 T
Shipping
R: Tape & Reel
T: Tube
Gamma Micro.
Circuit Type
GM317
Package
TA3: TO-263
TB3: TO-220
8