ETC REG1117-50

®
REG1117
REG1117A
800mA and 1A Low Dropout Positive Regulator
2.85V, 3V, 3.3V, 5V, and Adjustable
FEATURES
APPLICATIONS
● 2.85V, 3V, 3.3V, 5V, and ADJUSTABLE
VERSIONS
● SCSI-2 ACTIVE TERMINATION
● HAND-HELD DATA COLLECTION DEVICES
● 2.85V MODEL FOR SCSI-2 ACTIVE
TERMINATION
● HIGH EFFICIENCY LINEAR REGULATORS
● 5V LINEAR REGULATORS
● BATTERY POWERED INSTRUMENTATION
● OUTPUT CURRENT:
REG1117: 800mA max
REG1117A: 1A max
● OUTPUT TOLERANCE: ±1% max
● DROPOUT VOLTAGE:
REG1117: 1.2V max at IO = 800mA
REG1117A: 1.3V max at IO = 1A
● BATTERY MANAGEMENT CIRCUITS FOR
NOTEBOOK AND PALMTOP PCs
● INTERNAL CURRENT LIMIT
● THERMAL OVERLOAD PROTECTION
● SOT-223 SURFACE MOUNT PACKAGE
The REG1117 is a family of three-terminal voltage regulators capable of up to 800mA output.
Fixed output models include 2.85V, 3V, 3.3V
and 5V versions. The REG1117A provides 1A
of output current in an adjustable version. Output
voltage of the adjustable versions is set with two
external resistors. The REG1117’s low dropout
voltage allows its use with as little as 1V inputoutput voltage differential.
Laser trimming assures excellent output voltage
accuracy without adjustment. An NPN output
stage allows output stage drive to contribute to
the load current for maximum efficiency.
REG1117 and REG1117A are packaged in an
SOT-223 surface-mount package, suitable for
reflow soldering techniques.
1.4
Dropout Voltage (V)
DESCRIPTION
DROPOUT VOLTAGE (VIN – VOUT)
1.6
Max, TJ = 0°C to 125°C
1.2
1.0
Typical, TJ = 25°C
0.8
0.6
Max,
TJ = 25°C
= Test Points, REG1117A only
= Test Points, REG1117 and REG1117A
0.4
0
100
200 300 400 500
600 700 800
900 1000
Output Current (mA)
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1992 Burr-Brown Corporation
PDS-1162E
Printed in U.S.A. November, 1996
SPECIFICATIONS
At TJ = +25°C, unless otherwise noted.
REG1117, REG1117A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1
IO = 10mA, VIN = 4.85V
IO = 0 to 800mA, VIN = 4.05 to 10V
2.82
2.79
2.85
2.85
2.88
2.91
V
V
Note 1
IO = 10mA, VIN = 5V
IO = 0 to 800mA, VIN = 4.5 to 10V
2.97
2.94
3.00
3.00
3.03
3.06
V
V
Note 1
IO = 10mA, VIN = 5.3V
IO = 0 to 800mA, VIN = 4.8 to 10V
3.27
3.24
3.30
3.30
3.33
3.36
V
V
Note 1
IO = 10mA, VIN = 7V
IO = 0 to 800mA, VIN = 6.5 to 10V
4.95
4.90
5.00
5.00
5.05
5.10
V
V
Note 1
IO = 10mA, VIN – VO = 2V
IO = 10 to 800mA, VIN – VO = 1.4 to 10V
1.238
1.225
1.250
1.250
1.262
1.280
V
V
Note 1
IO = 10mA, VIN – VO = 2V
IO = 10mA to 1A, VIN – VO = 1.4 to 10V
1.238
1.225
1.250
1.250
1.262
1.280
V
V
IO = 0, VIN = 4.25 to 10V
IO = 0, VIN = 4.5 to 10V
IO = 0, VIN = 4.8 to 10V
IO = 0, VIN = 6.5 to 15V
IO = 10mA, VIN – VO = 1.5 to 13.75V
IO = 10mA, VIN – VO = 1.5 to 13.75V
1
2
2
3
0.1
0.1
7
7
7
10
0.4
0.4
mV
mV
mV
mV
%
%
IO = 0 to 800mA, VIN = 4.25V
IO = 0 to 800mA, VIN = 4.5V
IO = 0 to 800mA, VIN = 4.8V
IO = 0 to 800mA, VIN = 6.5V
IO = 10 to 800mA, VIN – VO = 3V
IO = 10mA to 1A, VIN – VO = 3V
2
2
3
3
0.1
0.1
10
12
12
15
0.4
0.4
mV
mV
mV
mV
%
%
IO = 100mA
IO = 500mA
IO = 800mA
IO = 1A
IO = 1A
1.00
1.05
1.10
1.2
1.2
1.10
1.15
1.20
1.30
1.55
V
V
V
V
V
950
1250
1200
1600
mA
mA
VIN – VO = 13.75V
1.7
5
mA
VIN – VO = 5V
IO = 10mA, VIN – VO = 1.4 to 10V
IO = 10mA to 800mA, VIN – VO = 1.4 to 10V
IO = 10mA to 1A, VIN – VO = 1.4 to 10V
4
50
0.5
0.5
10
120
5
5
mA
µA
µA
µA
30ms Pulse
0.01
0.1
%/W
OUTPUT VOLTAGE
REG1117-2.85
REG1117-3
REG1117-3.3
REG1117-5
REFERENCE VOLTAGE
REG1117 (Adjustable)
REG1117A (Adjustable)
LINE REGULATION
REG1117-2.85
REG1117-3
REG1117-3.3
REG1117-5
REG1117 (Adjustable)
REG1117A (Adjustable)
LOAD REGULATION
REG1117-2.85
REG1117-3
REG1117-3.3
REG1117-5
REG1117 (Adjustable)
REG1117A (Adjustable)
Note
Note
Note
Note
Note
Note
1
1
1
1
1
1
Note 1
Note 1
Note 1
Note 1
Note 1, 2
Note 1, 2
DROPOUT VOLTAGE
All Models
Note
Note
Note
Note
REG1117 Models
REG1117A
3
1
1
1
Note 1
CURRENT LIMIT
REG1117 Models
REG1117A
MINIMUM LOAD CURRENT
Adjustable Models
VIN – VO = 5V
VIN – VO = 5V
Note 1, 2
QUIESCENT CURRENT
Fixed-Voltage Models
Note 1
Adjust Pin Current
Note1, 2
vs Load Current, REG1117
Note 1
vs Load Current, REG1117A Note 1
THERMAL REGULATION
All Models
Note 4
RIPPLE REJECTION
All Models
800
1000
f = 120Hz, VIN – VOUT = 3V+1VPP Ripple
62
dB
TEMPERATURE DRIFT
Fixed-Voltage Models
Adjustable Models
TJ = 0°C to +125°C
TJ = 0°C to +125°C
0.5
2
%
%
LONG-TERM STABILITY
All Models
TA = +125°C, 1000Hr
0.3
%
f = 10Hz to 10kHz
0.003
%
OUTPUT NOISE
RMS noise All Models
THERMAL RESISTANCE
Operating Junction Temperature Range
Storage Range
Thermal Resistance, θJC
3-Lead SOT-223 Surface-Mount
0
–55
(Junction-to-Case at Tab)
+125
+125
15
°C
°C
°C/W
NOTES: (1) Specification applies over the full operating Junction temperature range, 0°C to 125°C. (2) REG1117 and REG1117A adjustable versions require a
minimum load current for ±3% regulation. (3) Dropout voltage is the Input voltage minus output voltage that produces a 1% decrease in output voltage.
(4) Percentage change in unloaded output voltage before vs after a 30ms power pulse of IO = 800mA (REG1117 models), IO = 1A (REG1117A), VIN – VO = 1.4V
(Reading taken 10ms after pulse).
®
REG1117
2
ABSOLUTE MAXIMUM RATINGS
ORDERING INFORMATION
PRODUCT(1)
Power Dissipation ........................................................... Internally Limited
Input Voltage ........................................................................................ 15V
Operating Junction Temperature Range ............................. 0°C to +125°C
Storage Temperature Range .......................................... –40°C to +150°C
Lead Temperature (soldering, 10s)(1) ............................................. +300°C
NOTE: (1) See “Soldering Methods.”
CONNECTION DIAGRAM
Front View
PART MARKING
PACKAGE
800mA Current Out
REG1117-2.85
REG1117-3
REG1117-3.3
REG1117-5
REG1117
BB11172
BB11173
BB11174
BB11175
BB1117
Plastic SOT-223
Plastic SOT-223
Plastic SOT-223
Plastic SOT-223
Plastic SOT-223
1A Current Out
REG1117A
BB1117A
Plastic SOT-223
NOTE: (1) Available in Tape and Reel, add –TR to Model Number.
SOT-223
FRONT VIEW
PACKAGE INFORMATION
Tab is VOUT
PRODUCT
Ground VOUT
(Adj.)(1)
VIN
Plastic SOT-223
NOTE: (1) Adjustable-Voltage Model.
PACKAGE
PACKAGE DRAWING
NUMBER(1)
800mA Current Out
REG1117-2.85
REG1117-3
REG1117-3.3
REG1117-5
REG1117
Plastic
Plastic
Plastic
Plastic
Plastic
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
311
311
311
311
311
1A Current Out
REG1117A
Plastic SOT-223
311
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
SIMPLIFIED SCHEMATIC
VIN
+
Current
Limit
Thermal
Limit
VOUT
10X
(Substrate)
Ground (Fixed-Voltage Models)
Adj. (Adjustable-Voltage Model)
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
3
REG1117
TYPICAL PERFORMANCE CURVE
At TJ = +25°C, unless otherwise specified.
LOAD REGULATION
∆ILOAD = 800mA
1400
1
1300
0
Output Voltage Deviation (mV)
Short-Circuit Current (mA)
SHORT-CIRCUIT CURRENT vs TEMPERATURE
REG1117A
1200
1100
REG1117 Models
1000
900
800
–50
–25
0
25
50
75
–1
REG1117-2.85
–2
–3
–4
REG1117-5
–5
–6
–7
–50
100
–25
0
Temperature (°C)
75
100
100
IOUT = 100mA
VRIPPLE = 1.0Vp-p
90
5
VIN = 6.5V to 15V
REG1117-5
4
80
Ripple Rejection (dB)
Output Voltage Change (mV)
50
RIPPLE REJECTION vs FREQUENCY
LINE REGULATION vs TEMPERATURE
6
3
2
1
REG1117-2.85
VIN = 4.25V to 10V
0
70
60
50
40
30
20
–1
10
0
–2
–50
–25
0
25
50
75
10
100
100
1k
10k
100k
Frequency (Hz)
Temperature (°C)
OUTPUT VOLTAGE vs TEMPERATURE
QUIESCENT CURRENT vs TEMPERATURE
2.0
8
Quiescent Current (mA)
7
Output Voltage Change (%)
25
Temperature (°C)
1.0
0
–1.0
Fixed-Voltage Models
6
5
4
3
2
1
–2.0
–50
–25
0
25
50
75
0
–50
100
Temperature (°C)
0
25
Temperature (°C)
®
REG1117
–25
4
50
75
100
TYPICAL PERFORMANCE CURVE (CONT)
At TJ = +25°C, unless otherwise specified.
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
Output Voltage
Deviation (mV)
Output Voltage
Deviations (V)
60
0.1
0
–0.1
CIN = 1µF
COUT = 10µF Tantalum
IOUT = 0.1A
40
20
0
0
–0.5
0
20
40
60
Time (µs)
80
100
4.25
3.25
0
20
40
60
80
100
120
140 160 180
200
The REG1117 has current limit and thermal shutdown
circuits that protect it from overload. The thermal shutdown
activates at approximately TJ = 165°C. For continuous operation, however, the junction temperature should not be
allowed to exceed 125°C. Any tendency to activate the
thermal shutdown in normal use is an indication of an
inadequate heat sink or excessive power dissipation. The
power dissipation is equal to:
PD = (VIN – VOUT) IOUT
The junction temperature can be calculated by:
TJ = TA + PD (θJA)
where TA is the ambient temperature, and
θJA is the junction-to-ambient thermal resistance
The REG1117 derives heat sinking from conduction through
its copper leads, especially the large mounting tab. These
must be soldered to a circuit board with a substantial amount
of copper remaining (see Figure 3). Circuit board traces
connecting to the tab and the leads should be made as large
as practical. Other nearby circuit traces, including those on
the back side of the circuit board, help conduct heat away
VO
REG1117
+
5.25
THERMAL CONSIDERATIONS
Figure 1 shows the basic hookup diagram for fixed-voltage
models. All models require an output capacitor for proper
operation and to improve high frequency load regulation. A
10µF tantalum capacitor is recommended. Aluminum electrolytic types of 50µF or greater can also be used. A high
quality capacitor should be used to assure that the ESR
(effective series resistance) is less than 0.5Ω.
Figure 2 shows a the hookup diagram for the adjustable
voltage model. Resistor values are shown for some commonly used output voltages. Values for other voltages can be
calculated from the equation shown in Figure 2. For best
load regulation, connect R1 close to the output pin and R2
close to the ground side of the load as shown.
10µF
Tantalum
–40
Time (µs)
APPLICATIONS INFORMATION
VIN
Input Voltage (V)
Load Current (A)
–20
CIN = 10µF
COUT = 10µF
Tantalum
VIN = 4.25V
Preload = 0.1A
0.5
+ 10µF
Tantalum
FIGURE 1. Fixed-Voltage Model—Basic Connections.
VIN
C1 +
10µF
3
REG1117
(Adj)
1
C3(1) +
10µF
VO
2
R1
+ C2
10µF
Load
VO =
R 1 + R2
R1
• (1.25V) + (50µA) (R2)
R2
This term is negligible with
proper choice of values—see
table at right.
VOUT (V)
R1 (Ω)(2)
R2 (Ω)(2)
1.25
1.5
2.1
2.85
3
3.3
5
10
Open
750
158
169
137
115
113
113
Short
147
107
215
191
187
340
787
NOTE: (1) C3 optional. Improves high-frequency line rejection. (2) Resistors are standard 1% values.
FIGURE 2. Adjustable-Voltage Model—Basic Connections.
®
5
REG1117
SOLDERING METHODS
The REG1117 package is suitable for infrared reflow and
vapor-phase reflow soldering techniques. The high rate of
temperature change that occurs with wave soldering, or hand
soldering can damage the REG1117.
Total Area: 50 x 50mm
35 x 17 mm
16 x 10 mm
TOPSIDE(1)
COPPER
AREA
BACKSIDE
COPPER
AREA
2500mm2
2500mm2
2500mm2
46°C/W
2500mm2
1250mm2
2500mm2
47°C/W
2500mm2
950mm2
2500mm2
49°C/W
2500mm2
2500mm2
0
51°C/W
2500mm2
1800mm2
0
53°C/W
1600mm2
600mm2
1600mm2
55°C/W
2500mm2
1250mm2
0
58°C/W
2500mm2
915mm2
0
59°C/W
1600mm2
600mm2
0
67°C/W
900mm2
340mm2
900mm2
72°C/W
900mm2
340mm2
0
85°C/W
TOTAL PC BOARD
AREA
16 x 10 mm
Without back-side copper: θJA ≈ 59°C/W
With solid back-side copper: θJA ≈ 49°C/W
FIGURE 3. Circuit Board Layout Example.
from the device, even though they are not electrically connected.
Make all nearby copper traces as wide as possible and leave
only narrow gaps between traces.
Table I shows approximate values of θJA for various circuit
board and copper areas. Nearby heat dissipating components, circuit board mounting conditions and ventilation can
dramatically affect the actual θJA.
A simple experiment will determine whether the maximum
recommended junction temperature is exceeded in an actual
circuit board and mounting configuration: Increase the
ambient temperature above that expected in normal operation until the device’s thermal shutdown is activated. If this
occurs at more than 40°C above the maximum expected
ambient temperature, then the TJ will be less than 125°C
during normal operation.
NOTE: (1) Tab is attached to the topside copper.
TABLE I.
INSPEC Abstract Number: B91007604, C91012627
Kelly, E.G. “Thermal Characteristics of Surface 5WK9Ω
Packages.” The Proceedings of SMTCON. Surface Mount
Technology Conference and Exposition: Competitive Surface
Mount Technology, April 3-6, 1990, Atlantic City, NJ, USA.
Abstract Publisher: IC Manage, 1990, Chicago, IL, USA.
TERMPWR
5V
TERMPWR
2.85V
1N5817
110Ω
110Ω
2.85V
REG1117-2.85
10µF
THERMAL RESISTANCE
JUNCTION-TO-AMBIENT
5V
1N5817
REG1117-2.85
10µF
10µF
10µF
(Up to 27 Lines)
110Ω
110Ω
FIGURE 4. SCSI Active Termination Configuration.
REG1117-5
In
VIN > 12V
10µF
REG1117-5
Out
+
5V to 10V
+
GND
In
VIN > 9.0V
100µF
10µF
+
Out
GND
2.5VOUT
10µF
+
1kΩ
REF1004-2.5
FIGURE 5. Adjusting Output of Fixed Voltage Models.
FIGURE 6. Regulator with Reference.
®
REG1117
6
7.5V
+
100µF
REG1117-5
VIN
In
10µF
5.2V Line
5.0V Battery
Out
+
GND
50Ω
1kΩ
REG1117-5
In
6.5V
10µF
Out
GND
+
+
100µF
FIGURE 7. Battery Backed-Up Regulated Supply.
REG1117-5
In
VIN
10µF
+
Out
GND
+
100µF
VOUT = –5V
Floating Input
FIGURE 8. Low Dropout Negative Supply.
®
7
REG1117