CM1117F

CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
FEATURES
The CM1117F series of adjustable and fixed voltage
‹
Three Terminal Adjustable or Fixed Voltages: 1.8V, 2.5V,
3.3V, and adjustable.
regulators are designed to provide 1A for applications
requiring high efficiency. All internal circuitry is designed to
‹
Output Current of 1A
operated down to 1V input to output differential and the
‹
Low dropout voltage: 1.1V Typ.
dropout voltage is fully specified as a function of load current.
‹
Line Regulation: 0.3% Max
‹
Load Regulation: 2% Max
The CM1117F offers current limiting and thermal protection.
‹
Fast Transient Response
The on chip trimming adjusts the reference voltage accuracy
‹
Thermal Protection
to2%.
‹
SOT-223 package available
‹
Rugged 3KV ESD withstand capability.
APPLICATIONS
‹
High Efficiency Linear Regulators
‹
Post Regulators for Switching Supplies
‹
Battery Chargers
‹
Active SCSI Terminators
‹
Post Regulator for Switching DC/DC Converter
‹
Battery Powered Instrumentation
PIN CONFIGURATION
GND/ADJ
VOUT
VIN
SOT-223
Top View
1
2
3
ORDERING INFORMATION
Package Type
Operating Temperature
Output Voltage
SOT-223
Range (TA)
CM1117FDCM223
0℃ ~ +85℃
1.8V
CM1117FKCM223
0℃ ~ +85℃
2.5V
CM1117FSCM223
0℃ ~ +85℃
3.3V
CM1117FCM223
0℃ ~ +85℃
ADJ.
CM1117FGDCM223*
0℃ ~ +85℃
1.8V
CM1117FGKCM223*
0℃ ~ +85℃
2.5V
CM1117FGSCM223*
0℃ ~ +85℃
3.3V
CM1117FGCM223*
0℃ ~ +85℃
ADJ.
*Note: G : Suffix for Pb Free Product
2007/11/06 Rev1.3
Champion Microelectronic Corporation
Page 1
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
ABSOLUTE MAXIMUM RATINGS
Input Voltage
…………….…………………………………………….……. +12V
Operating Junction Temperature Range, TJ ……………...… 0℃ to +125℃
Storage Temperature ………………………………….….…... -40℃ to +150℃
Lead Temperature (10 sec.) ……..……………………..….…………….... 260℃
THERMAL INFORMATION
Parameter
Maximum
Unit
Thermal Resistance (Θja)
SOT-223
136
℃/W
Internal Power Dissipation (PD) (ΔT = 100℃, No Heatsink)
SOT-223
900
mW
125
260
℃
℃
Maximum Junction Temperature
Maximum Lead Temperature (10 Sec)
BLOCK DIAGRAM
2007/11/06 Rev1.3
Champion Microelectronic Corporation
Page 2
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IOUT = 10mA, and TJ = +25℃; unless otherwise noted
Parameter
Device
Test Conditions
Reference Voltage
CM1117F
Output Voltage
Line Regulator
Load Regulation
Dropout Voltage
(VIN – VOUT )
Current Limit
Max.
IOUT = 10mA, VIN= 5V
1.225
1.250
1.275
V
CM1117FD
10mA <= IOUT <= 1A, 3.2V<= VIN <= 7V
1.764
1.800
1.836
V
CM1117FK
10mA <= IOUT <= 1A, 4.25V<= VIN <= 7V
2.450
2.500
2.550
V
CM1117FS
10mA <= IOUT <= 1A, 4.75V<= VIN <= 7V
3.234
3.300
3.366
V
Adj. Output
IOUT = 10mA, 1.5V<= VIN <= 7V
0.05
0.30
%
Fixed Output
IOUT = 10mA, VOUT + 1.5V<= VIN <= 7V
1
6.0
mV
Adj. Output
10mA <= IOUT <= 1A, VIN – VOUT = 3V
0.4
2
%
Fixed Output
10mA <= IOUT <= 1A, VIN = VOUT + 1.5V
8
36
mV
IOUT = 10mA
1
IOUT = 1A
1.1
(VIN – VOUT ) = 3V
1.8
Fixed Output
Fixed Output
Minimum Load
Ripple Rejection
(Note 2)
Thermal Regulation
(Note 2)
Adjust Pin Current
Unit
Typ.
VIN <= 7V
Current (Note 1)
Quiescent Current
CM1117F
Min.
Fixed Output
1.25
V
A
4
mA
VIN <= 7V
10
13
mA
fO = 120Hz, 1VRMS, , IOUT = 1A, (VIN – VOUT )= 3V
35
TA = 25℃, 30ms pulse
0.01
0.1
%W
IOUT = 10mA, VIN – VOUT = 2V
48
120
μA
dB
Note 1: For the adjustable device, the minimum load current is the minimum current required to maintain regulation. Normally the
current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement.
Note 2: These parameters, although guaranteed, are not tested in production.
2007/11/06 Rev1.3
Champion Microelectronic Corporation
Page 3
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
APPLICATION CIRCUIT
Adjustable Regulator
VOUT = 1.25V (1+R2/R1)
5V Regulator with Shutdown
Fixed Voltage Regulator
2007/11/06 Rev1.3
Champion Microelectronic Corporation
Page 4
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
Application Hints
Thermal Considerations
Like any linear voltage regulator, CM1117F requires
It is important that the thermal limit of the package is
external capacitors to ensure stability. The external
not exceeded.
capacitors must be carefully selected to ensure
protection. When the thermal limit is exceeded, the IC
performance.
will enter protection, and VOUT will be pulled to ground.
The CM1117F has built-in thermal
The power dissipation for a given application can be
calculated as following:
Input Capacitor
An input capacitor of at least 10μF is required.
Ceramic or Tantalum can be used. The value can be
The power dissipation (PD) is
increase without upper limit.
PD = IOUT * [VIN – VOUT]
The thermal limit of the package is then limited to
Output Capacitor
An output capacitor is required for stability.
It must be
placed no more than 1 cm away from the VOUT pin, and
connected directly between VOUT and GND pins. The
minimum value is 22μF but may be increase without
limit.
PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction
temperature, TA is the ambient temperature, and ΘJA is
around 136°C/W for CM1117F. CM1117F is designed
to enter thermal protection at 125°C. For example, if
TA is 25°C then the maximum PD is limited to about
0.9W. In other words, if IOUT(MAX) = 0.5A, then [VIN –
VOUT] cannot exceed 1.8V.
2007/11/06 Rev1.3
Champion Microelectronic Corporation
Page 5
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
Typical Performance Characteristics
Reference Voltage vs Junction Temperature
Line Transients
Reference Voltage (mV)
1250
1245
1240
1235
1230
1225
1220
-25
0
25
50
75
100
125
150
Junction Temperature (C)
Load Transients
Output Voltage vs Junction Temperature
3.70
3.65
Output Voltage
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
3.20
-25
0
25
50
75
100
125
150
Junction Temperature (C)
Dropout Voltage vs Output Current
1.14
Dropout Voltage (V)
1.12
1.1
1.08
1.06
1.04
1.02
1
0
200
400
600
800
1000
Output Current (mA)
2007/11/06 Rev1.3
Champion Microelectronic Corporation
Page 6
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
PACKAGE DIMENSION
SOT-223 (M223)
D
A
L
L1
H
E
B1
e
e1
A
8°
B
B1
D
E
e
e1
H
L
L1
B
2007/11/06 Rev1.3
B
θ
Champion Microelectronic Corporation
Page 7
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated
circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify,
before placing orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or
environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for
use in life-support applications, devices or systems or other critical applications. Use of CMC products in such applications is
understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the
customer should provide adequate design and operating safeguards.
HsinChu Headquarter
Sales & Marketing
5F, No. 11, Park Avenue II,
Science-Based Industrial Park,
HsinChu City, Taiwan
T E L : +886-3-567 9979
F A X : +886-3-567 9909
7F-6, No.32, Sec. 1, Chenggong Rd., Nangang
District, Taipei City 115, Taiwan
2007/11/06 Rev1.3
T E L : +886-2-2788 0558
F A X : +886-2-2788 2958
Champion Microelectronic Corporation
Page 8
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