Global Mixed-mode Technology Inc.
G1117
1A Adjustable Low-Dropout Linear Regulator
Features
Available in adjust version
Space saving TO-252, SOT-223 and TO-92
package
Internal short circuit current limiting
Internal over temperature protection
Output current in excess of 1A
Output current in excess of 100mA with
TO-92 package
General Description
The G1117 is a low dropout linear regulator with a
dropout of 1.2V at 800mA of load current and 1.3V at
1A of load current. It is available in an adjustable
version, which can set the output from 1.25V to 5V
with only two external resistors.
The G1117 provides over temperature and over cur-
rent protection circuits to prevent it from being dam-
aged by abnormal operating conditions.
The G1117 is available in TO-252, SOT-223 and
TO-92 packages. A minimum of 10μF tantalum elec-
trolytic capacitor is required at the output to improve
the transient response and stability.
Applications
Post regulation for switching DC/DC con-
verter
High efficiency linear regulator
Battery charger
Battery powered instrumentation
Motherboard
Ordering Information
ORDER
NUMBER
G1117T43U
G1117T63U
-----
ORDER NUMBER
(Pb free)
G1117T43Uf
G1117T63Uf
G1117TD3B
MARKING
G1117
G1117
G1117
TEMP.
RANGE
-40°C~85°C
-40°C~85°C
-40°C~85°C
PACKAGE
TO-252
SOT-223
TO-92
1
GND/ADJ
GND/ADJ
GND/ADJ
PIN OPTION
2
V
OUT
V
OUT
V
OUT
3
V
IN
V
IN
V
IN
* For other package types and pin options, please contact us at sales
@
gmt.com.tw
Order Number Identification
GXXXX
XX
X
X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE
T4:TO-252
T6: SOT-223
TD: TO-92
PIN OPTION
1
3: GND/ADJ
2
V
OUT
3
V
IN
PACKING
U: Tape & Reel
B: Bag
Package Type
Typical Application
[Note 4]: Type of C
OUT
I
O
Top View
Top View
Top
View
V
IN
V
IN
G1117
V
OUT
GND/ADJ
V
OUT
C1
1µF
R1
R2
C
OUT
10µF
1
2
3
1
2
3
TO-252
SOT-223
1
2
3
TO-92
Ver: 1.9
Mar 07, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1)
Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7V
Power Dissipation Internally Limited
(Note 2)
Maximum Junction Temperature . . . . . . . . . . . . . .150°C
Reflow Temperature (soldering, 10sec) . . . . . . 260°C
Thermal Resistance Junction to Ambient, (θ
JA
)
SOT-223 . . . . . . . . . . . . . . . . . . . . . . . . . . . .116°C/W
Thermal Resistance Junction to Case, (θ
Jc
)
SOT-223 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21°C/W
Note
(1)
: See Recommended Minimum Footprint
G1117
Absolute Maximum Ratings
(Note 1)
(V
IN
-V
ADJ
) Voltage. . . . . . . . . . . . . . . . . . . . . .2.5V~6.5V
Temperature Range. . . . . . . . . . . . . .-40°C
≤
T
A
≤85°C
Operating Conditions
Electrical Characteristics
Operating Conditions: V
IN
≤
6.5V, T
J
= 25°C unless otherwise specified. [Note3]
PARAMETER
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Adjust Pin Current Change
Minimum Load Current
Quiescent Current
Ripple Rejection
CONDITIONS
V
IN
- V
OUT
= 2V, I
OUT
= 10mA
(V
OUT
+ 1.5V) < V
IN
< 6.5V, I
OUT
= 10mA
(V
IN
- V
OUT
) = 2V, 10mA < I
OUT
< 1A
ΔV
OUT
= 2%, I
OUT
= 800mA
ΔV
OUT
= 2%, I
OUT
= 1A
(V
IN
- V
OUT
) = 2V
V
IN
- V
OUT
= 2V, 10mA < I
OUT
< 1A
1.5V < (V
IN
- V
OUT
) < 5.25V
V
IN
- V
OUT
= 2V
f = 120Hz, C
OUT
= 10μF Tantalum,
(V
IN
- V
OUT
) = 3V, I
OUT
= 800mA
T
A
= 25°C, 30ms pulse
V
IN
= 4V, I
O
=10mA
T
A
= 25°C, 10Hz < f < 10kHz, I
LOAD
= 10mA
MIN
1.225
---
---
---
---
1000
---
10
30
---
---
---
---
---
---
---
TYP
1.250
1.32
0.04
1.2
1.3
1200
0.15
---
80
50
0.004
0.3
0.007
116
150
10
MAX
1.275
---
---
1.3
1.4
---
---
---
150
---
0.02
---
---
---
---
---
UNITS
V
%
%
V
mA
µA
mA
µA
dB
%/W
%
%
°C/W
°C
°C
Thermal Regulation
Temperature Stability
RMS Output Noise (% of V
OUT
)
Thermal Resistor Junction-to-Ambient
SOT-223; Recommended Minimum Footprint
(No heat sink; No air flow)
Thermal Shutdown
Junction Temperature
Thermal Shutdown Hysteresis
Note1:
Note2:
Note3:
Note4:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are
conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications
and test conditions see the Electrical Characteristics.
The maximum power dissipation is a function of the maximum junction temperature, T
Jmax
; total thermal resistance,
θ
JA
,
and ambient temperature T
A
. The maximum allowable power dissipation at any ambient temperature is T
jmax
-T
A
/
θ
JA
. If
this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. For the
G1117 in SOT-223 package;
θ
JA
is 116°C/W (See recommend minimum footprint).
Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
The type of output capacitor should be tantalum or aluminum.
Ver: 1.9
Mar 07, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Definitions
Output Voltage
The G1117 provides an adjustable output voltage from
1.25V to 5V. With two external resistors. It can be for-
mulated as:
V
OUT
= 1.25V x
(
1+
I
ADJ
= 80µA (TYP.)
Dropout Voltage
The input/output Voltage differential at which the
regulator output no longer maintains regulation against
further reductions in input voltage. Measured when the
output drops 2% below its nominal value. Dropout
voltage is affected by junction temperature, load cur-
rent and minimum input supply requirements.
Line Regulation
The change in output voltage for a change in input
R
2
R
1
G1117
voltage. The measurement is made under conditions
of low dissipation or by using pulse techniques such
that average chip temperature is not significantly af-
fected.
Load Regulation
The change in output voltage for a change in load
current at constant chip temperature. The measure-
ment is made under conditions of low dissipation or by
using pulse techniques such that average chip tem-
perature is not significantly affected.
Maximum Power Dissipation
The maximum total device dissipation for which the
regulator will operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip
and is not delivered to the load.
)
+ I
ADJ
x R
2
Ver: 1.9
Mar 07, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
V
IN
= 4V, C
IN
= 10µF, C
OUT
=10µF, T
A
=25°C, unless otherwise noted.
Line transient
G1117
Load Transient
Dropout Voltage vs. Load Current
1.06
1.04
Dropout Voutput (V)
I
ADJ
Current vs. Load Current
94
91
85
°
C
1.02
1
0.98
0.96
0.94
0.92
0.9
0
200
85
°
C
I
ADJ
Current (µA)
88
85
82
79
76
73
70
-45
°
C
25
°
C
25
°
C
-45
°
C
400
600
Output Current (mA)
800
1000
0
100
200
300
400
500
600
700
800
Load Current (mA)
Ripple Rejection
60
50
Ripple Rejection (dB)
Output Voltage Change (%)
Temperature Stability
1
I
OUT
= 100mA
(V
IN
- V
OUT
) > 3V
I
OUT
= 800mA
0.5
40
30
20
10
0
10
0
C
OUT
= 10μF
I
OUT
= 0.1A~0.8A
-0.5
-1
-40
100
1000
10000
Frequency (Hz)
100000
-20
0
20
40
60
80
100
Temperature
(°
C
)
Ver: 1.9
Mar 07, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(continued)
Output Noise
1.60
V
IN
= 4.5V
I
OUT
= 10mA
1.50
Short-Circuit current (A)
1.40
1.30
1.20
1.10
1.00
0.90
25
o
C
115
o
C
G1117
Short-Circuit Current
-45
o
C
0.80
1.25 1.75 2.25 2.75 3.25 3.75 4.25 4.75 5.25
(V
IN
-V
OUT
) Diffrential (V)
Load Regulation
0.15
Output Voltage Deviation (%)
Overcurrent Protection Characteristics
0.1
0.05
0
-0.05
-0.1
-40 -25 -10
5
20
35
50
65
80
95 110
Temperature(
°
C)
SOT-223 Max. Power Dissipation
vs. PCB Top Copper Area
3
2.5
2
1.5
1
0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
PCB Top Copper Area (in
2
)
4.5
5
3
2.5
2
1.5
1
0.5
0
25
SOT-223 Max. Power
Dissipation vs. T
AMB
Unite:in
2
A=0.5
A=1.0
A=1.5
A=2.0
A=2.5
A=3.0
A=3.5
A=4.0
A=4.5
A=5.0
Max. Dissipation Power (W)
Max. Dissipation Power (W)
45
T
AMB
(
o
C)
65
85
Ver: 1.9
Mar 07, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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