SBAS221E - DECEMBER 2001 - REVISED SEPTEMBER 2003
60mA Switched Cap
BUCK/BOOST CONVERTER
REG710
FEATURES
D
Wide Input Range: 1.8V to 5.5V
D
Automatic Step-Up/Step-Down Operation
D
Low Input Current Ripple
D
Low Output Voltage Ripple
D
Minimum Number of External
Components
No Inductors
D
1MHz Internal Oscillator Allows Small
Capacitors
D
Shutdown Mode
D
Thermal and Current Limit Protection
D
Six Output Voltages Available:
5.5V, 5.0V, 3.3V, 3.0V, 2.7V, 2.5V
D
Small Packages:
- SOT23-6
- TSOT23-6 (REG71055 and REG71050 Only)
D
Evaluation Modules Available:
REG710EVM-33, REG710EVM-5
APPLICATIONS
D
Smart Card Readers
D
SIM Card Supplies
D
Cellular Phones
D
Portable Communication Devices
D
Personal Digital Assistants
D
Notebook and Palm-Top Computers
D
Modems
D
Electronic Games
D
Handheld Meters
D
PCMCIA Cards
D
Card Buses
D
White LED Drivers
D
LCD Displays
D
Battery Backup Supplies
DESCRIPTION
The REG710 is a switched capacitor voltage converter,
that produces a regulated, low-ripple output voltage from
an unregulated input voltage. A wide-input supply voltage
of 1.8V to 5.5V makes the REG710 ideal for a variety of
battery sources, such as single cell Li-Ion, or two and three
cell nickel- or alkaline-based chemistries.
The input voltage may vary above and below the output
voltage and the output will remain in regulation. It works
equally well for step-up or step-down applications without
the need for an inductor, providing low EMI DC/DC
conversion. The high switching frequency allows the use
of small surface-mount capacitors, saving board space
and reducing cost. The REG710 is thermally protected and
current limited, protecting the load and the regulator during
fault conditions. Typical ground pin current (quiescent
current) is 65
A with no load, and less than 1
A in
shutdown mode. The 5.5V version of the REG710 is
available in a thin TSOT23-6 package. All other versions
are available in a small SOT23-6 package.
REG710 Used in White LED Backlight Application
C
IN
2.2
F
C
PUMP
0.22
F
3.3V to
4.2V
C
OUT
2.2
F
R
LED
GND
Enable
REG71050
REG710-5
LED
LED
R
R
www.ti.com
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2001-2003, Texas Instruments Incorporated
REG710
SBAS221E - DECEMBER 2001 - REVISED SEPTEMBER 2003
www.ti.com
2
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage
-0.3V to +6.0V
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Input
-0.3V to VIN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Short-Circuit Duration
Indefinite
. . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range
-55
C to +125
C
. . . . . . . . . . . . . . .
Storage Temperature Range
-65
C to +150
C
. . . . . . . . . . . . . . . .
Junction Temperature
-55
C to +150
C
. . . . . . . . . . . . . . . . . . . . .
Lead Temperature (soldering, 3s)
+240
C
. . . . . . . . . . . . . . . . . . .
NOTE: (1) Stresses above these ratings may cause permanent damage. Expo-
sure to absolute maximum conditions for extended periods may degrade device
reliability.
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to
observe proper handling and installation procedures can cause
damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE ORDERING INFORMATION
PRODUCT
OUTPUT
VOLTAGE
PACKAGE-LEAD
PACKAGE
DESIGNATOR(1)
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING(2)
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
5.5V Output
5.5V
TSOT23-6
DDC
-40
C to +85
C
R10H
REG71055DDCT
Tape and Reel, 250
5.5V Output
REG71055DDC
5.5V
TSOT23-6
DDC
-40
C to +85
C
R10H
REG71055DDCR
Tape and Reel, 3000
5V Output
5.0V
SOT23-6
DBV
-40
C to +85
C
R10B
REG710NA-5/250
Tape and Reel, 250
5V Output
REG710NA-5
5.0V
SOT23-6
DBV
-40
C to +85
C
R10B
REG710NA-5/3K
Tape and Reel, 3000
5V Output
5.0V
TSOT23-6
DDC
-40
C to +85
C
GAAI
REG71050DDCT
Tape and Reel, 250
5V Output
REG71050DDC
5.0V
TSOT23-6
DDC
-40
C to +85
C
GAAI
REG71050DDCR
Tape and Reel, 3000
3.3V Output
3.3V
SOT23-6
DBV
-40
C to +85
C
R10C
REG710NA-3.3/250
Tape and Reel, 250
3.3V Output
REG710NA-3.3
3.3V
SOT23-6
DBV
-40
C to +85
C
R10C
REG710NA-3.3/3K
Tape and Reel, 3000
3V Output
3.0V
SOT23-6
DBV
-40
C to +85
C
R10D
REG710NA-3/250
Tape and Reel, 250
3V Output
REG710NA-3
3.0V
SOT23-6
DBV
-40
C to +85
C
R10D
REG710NA-3/3K
Tape and Reel, 3000
2.7V Output
2.7V
SOT23-6
DBV
-40
C to +85
C
R10F
REG710NA-2.7/250
Tape and Reel, 250
2.7V Output
REG710NA-2.7
2.7V
SOT23-6
DBV
-40
C to +85
C
R10F
REG710NA-2.7/3K
Tape and Reel, 3000
2.5V Output
REG710NA-2.5
2.5V
SOT23-6
DBV
-40
C to +85
C
R10G
REG710NA-2.5/250
Tape and Reel, 250
2.5V Output
REG710NA-2.5
2.5V
SOT23-6
DBV
-40
C to +85
C
R10G
REG710NA-2.5/3K
Tape and Reel, 3000
NOTES: (1) For the most current specifications and product information, refer to our web site at www.ti.com. (2) Voltage will be marked on reel.
PIN CONFIGURATION
Top View
TSOT23/SOT23
V
OUT
GND
Enable
1
2
3
6
5
4
C
PUMP+
V
IN
C
PUMP
-
SIMPLIFIED BLOCK DIAGRAM
V
IN
Enable
3
5
4
6
1
V
OUT
2 GND
Thermal
Control
&
REG710
C
IN
2.2
F
C
OUT
2.2
F
C
PUMP
0.22
F
REG710
SBAS221E - DECEMBER 2001 - REVISED SEPTEMBER 2003
www.ti.com
3
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, T
A
= -40
5
C to +85
5
C
At TA = +25
C, VIN = VOUT/2 + 0.75V, IOUT = 10mA, CIN = COUT = 2.2
F, CPUMP = 0.22
F, VENABLE = 1.3V, unless otherwise noted.
PARAMETER
CONDITIONS
REG710NA
UNITS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT VOLTAGE
Tested Startup
See conditions under Output Voltage
REG71055
See conditions under Output Voltage
with a resistive load not lower than typical VOUT/IOUT.
3.0
5.5
V
REG710-5
with a resistive load not lower than typical VOUT/IOUT.
2.7
5.5
V
All Other Models
1.8
5.5
V
OUTPUT VOLTAGE
REG71055
IOUT
10mA, 3.0V
VIN
5.5V
5.2
5.5
5.8
V
IOUT
30mA, 3.25V
VIN
5.5V
5.2
5.5
5.8
V
REG710-5, REG71050
IOUT
10mA, 2.7V
VIN
5.5V
4.7
5.0
5.3
V
IOUT
30mA, 3.0V
VIN
5.5V
4.7
5.0
5.3
V
IOUT
60mA, 3.3V
VIN
4.2V
4.6
5.0
5.4
V
REG710-3.3
IOUT
10mA, 1.8V
VIN
5.5V
3.10
3.3
3.50
V
IOUT
30mA, 2.2V
VIN
5.5V
3.10
3.3
3.50
V
REG710-3
IOUT
10mA, 1.8V
VIN
5.5V
2.82
3.0
3.18
V
IOUT
30mA, 2.2V
VIN
5.5V
2.82
3.0
3.18
V
REG710-2.7
IOUT
10mA, 1.8V
VIN
5.5V
2.54
2.7
2.86
V
IOUT
30mA, 2.0V
VIN
5.5V
2.54
2.7
2.86
V
REG710-2.5
IOUT
10mA, 1.8V
VIN
5.5V
2.35
2.5
2.65
V
IOUT
30mA, 2.0V
VIN
5.5V
2.35
2.5
2.65
V
OUTPUT CURRENT
Nominal
30
mA
Short Circuit(1)
100
mA
OSCILLATOR FREQUENCY(2)
1.0
MHz
EFFICIENCY(3)
IOUT = 10mA, VIN = 1.8V, REG710-3.3
90
%
RIPPLE VOLTAGE(4)
IOUT = 30mA
35
mVp-p
ENABLE CONTROL
VIN = 1.8V to 5.5V
Logic High Input Voltage
1.3
VIN
V
Logic Low Input Voltage
-0.2
0.4
V
Logic High Input Current
100
nA
Logic Low Input Current
100
nA
THERMAL SHUTDOWN
Shutdown Temperature
160
C
Shutdown Recovery
140
C
SUPPLY CURRENT
(Quiescent Current)
IOUT = 0mA
65
100
A
In Shutdown Mode
VIN = 1.8V to 5.5V, Enable = 0V
0.01
1
A
TEMPERATURE RANGE
Specification Ambient Temperature
TA
-40
+85
C
Operating Ambient Temperature
TA
-55
+125
C
Storage Ambient Temperature
TA
-65
+150
C
Thermal Resistance,
q
JA
SOT23-6
200
C/W
TSOT23-6
220
C/W
(1) The supply current is twice the output short-circuit current.
(2) The converter regulates by enabling and disabling periods of switching cycles. The switching frequency is the oscillator frequency during
an active period.
(3) See efficiency curves for other VIN/VOUT configurations.
(4) Effective Series Resistance (ESR) of capacitors is < 0.1
.
REG710
SBAS221E - DECEMBER 2001 - REVISED SEPTEMBER 2003
www.ti.com
4
TYPICAL CHARACTERISTICS
At TA = +25
C, VIN = VOUT/2 + 0.75V, IOUT = 5mA, CIN = COUT = 2.2
F, CPUMP = 0.22
F, VENABLE = 1.3V, unless otherwise noted.
EFFICIENCY vs V
IN
V
IN
(V)
E
f
f
i
ci
enc
y
(
%)
90
80
70
60
50
40
30
2
2.5
3
3.5
4
4.5
5
5.5
1.5
REG710-5, REG71050
REG71055
REG710-3.3
REG710-3
REG710-2.5
REG710-2.7
EFFICIENCY vs LOAD CURRENT
(REG710-5V, REG71050)
Load Current (mA)
Effi
c
i
e
n
c
y
(
%)
90
80
70
60
50
40
30
1
10
100
0.1
V
IN
= V
OUT
V
IN
= 2.7V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 3.3V
V
IN
= 3V
EFFICIENCY vs LOAD CURRENT
(REG710-3.3V)
Load Current (mA)
Effi
c
i
e
n
c
y
(
%)
90
80
70
60
50
40
30
1
10
100
0.1
V
IN
= V
OUT
V
IN
= 1.8V
V
IN
= 2.2V
EFFICIENCY vs LOAD CURRENT
(REG710-3V)
Load Current (mA)
Effi
c
i
e
n
c
y
(
%)
90
80
70
60
50
40
30
1
10
100
0.1
V
IN
= V
OUT
V
IN
= 1.8V
V
IN
= 2.2V
EFFICIENCY vs LOAD CURRENT
(REG710-2.7V)
Load Current (mA)
Effi
c
i
e
n
c
y
(
%)
80
75
70
65
60
55
50
45
40
35
30
1
10
100
0.1
V
IN
= V
OUT
V
IN
= 1.8V
V
IN
= 2.2V
EFFICIENCY vs LOAD CURRENT
(REG710-2.5V)
Load Current (mA)
Effi
c
i
e
n
c
y
(
%)
80
75
70
65
60
55
50
45
40
35
30
1
10
100
0.1
V
IN
= V
OUT
V
IN
= 1.8V
V
IN
= 2.2V
REG710
SBAS221E - DECEMBER 2001 - REVISED SEPTEMBER 2003
www.ti.com
5
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25
C, VIN = VOUT/2 + 0.75V, IOUT = 5mA, CIN = COUT = 2.2
F, CPUMP = 0.22
F, VENABLE = 1.3V, unless otherwise noted.
SUPPLY CURRENT vs TEMPERATURE
(No Load)
Temperature (
_
C)
S
u
pp
ly
C
u
r
r
en
t
(
A)
100
80
60
40
20
0
-
30
-
20
0
10
20
30
40
50
60
70
80
90
-
40
-
10
LOAD TRANSIENT RESPONSE
20mV/div
V
OUT
I
LOAD
10mA/div
Time (10
s/div)
BW = 20MHz
SUPPLY CURRENT vs TEMPERATURE
(Not Enabled)
Temperature (
_
C)
S
u
p
p
l
y
C
u
r
r
en
t
(
nA
)
20
18
16
14
12
10
8
6
4
2
0
-
30
-
20
-
10 0
10
20
30
40
50
60
70
80
90
-
40
LINE TRANSIENT RESPONSE
2V/div
3.5V
4.5V
V
IN
V
OUT
50mV/div
Time (50
s/div)
BW = 20MHz
Boost Mode
Buck Mode
REG710-3.3V
R
L
= 110
OUTPUT VOLTAGE vs TEMPERATURE
Junction Temperature (
_
C)
O
u
t
p
ut
V
o
l
t
a
g
e
C
ha
n
g
e
(
%)
0.2
0.1
0.0
-
0.1
-
0.2
-
0.3
-
0.4
-
0.5
-
0.6
-
20
0
20
40
60
80
100
120
140
-
40
OUTPUT VOLTAGE DRIFT HISTOGRAM
V
OUT
Drift (ppm/
_
C)
P
e
r
c
e
n
t
a
ge
of
U
n
it
s
(
%
)
25
20
15
10
5
0
<
-
140
<
-
116
<
-
92
<
-
68
<
-
44
<
-
20
<4
<2
8
<5
2
<7
6
<
100
>
100
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