CM2831 300mA CMOS LDO WITH ENABLE

CM2831
300mA CMOS LDO WITH ENABLE
GENERAL DESCRIPTION
FEATURES
The CM2831 family is a positive voltage linear regulator
Very Low Dropout Voltage
developed utilizing CMOS technology featured low quiescent
Low Current Consumption: Typ. 30 µ A, Max. 35 µ A
current (30 µ A typ.), low dropout voltage, and high output
Output Voltage: 1.8V, 1.9V, 2.2V, 2.5V, 2.7V, 2.8V, 2.9V,
voltage accuracy, making them ideal for battery applications.
3.0V, 3.3V, 3.5V, 3.6V, and 3.8V
EN input connected to CMOS has low bias current. The
High Accuracy Output Voltage: +/- 1.5%
space-saving SOT-23-5 package is attractive for “Pocket” and
Guaranteed 300mA Output
“Hand Held” applications.
Input Range up to 7.0V
Thermal Shutdown
These rugged devices have both Thermal Shutdown, and
Current Limiting
Current Fold-back to prevent device failure under the “Worst”
Compact Package: SOT-23-5
of operating conditions.
Factory Pre-set Output Voltages
Short Circuit Current Fold-Back
In application requiring a low noise, regulated supply, place a
Low Temperature Coefficient
1000pF capacitor between Bypass and Ground.
The CM2831 is stable with an output capacitance of 2.2 µ F or
greater.
APPLICATIONS
Battery-powered devices
Personal communication devices
Home electric/electronic appliances
PC peripherals
TYPICAL APPLICATIONS
IN
IN
C M 2831
BYP
GND
5V
2004/04/30 Rev. 1.6
C1
1uF
OUT
OUT
EN
C2
1nF
Champion Microelectronic Corporation
C3
2.2uF
Page 1
CM2831
300mA CMOS LDO WITH ENABLE
PIN CONFIGURATION
SOT-23-5
Top View
4
VIN
GND
EN
BYP
VOUT
5
1
2
3
BLOCK DIAGRAM
IN
O UT
Overcurrent
Shutdown
1uA
R1
Thermal
Shutdown
EN
-
BYP
AMP
+
Vref = 1.176V
R2
G ND
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Page 2
CM2831
300mA CMOS LDO WITH ENABLE
ORDERING INFORMATION
Part Number
CM2831DIM25
CM2831EIM25
CM2831HIM25
CM2831KIM25
CM2831MIM25
CM2831NIM25
CM2831OIM25
CM2831PIM25
CM2831SIM25
CM2831UIM25
CM2831VIM25
CM2831XIM25
CM2831GDIM25
CM2831GEIM25
CM2831GHIM25
CM2831GKIM25
CM2831GMIM25
CM2831GNIM25
CM2831GOIM25
CM2831GPIM25
CM2831GSIM25
CM2831GUIM25
CM2831GVIM25
CM2831GXIM25
Output Voltage
1.8V
1.9V
2.2V
2.5V
2.7V
2.8V
2.9V
3.0V
3.3V
3.5V
3.6V
3.8V
1.8V
1.9V
2.2V
2.5V
2.7V
2.8V
2.9V
3.0V
3.3V
3.5V
3.6V
3.8V
Temperature Range
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Note: For other pre-set output voltage requirements, please contact Champion Sales office.
ABSOLUTE MAXIMUM RATINGS
OPERATING RATINGS
Input Voltage
Ambient Temperature Range (TA) ……... -40℃ to +85℃
…………….……………………………. +7V
Output Current
…………………….……
PD / (VIN - Vo) mA
Output Voltage
…………………… GND-0.3V to VIN+0.3V
Junction Temperature Range
…..…... -40℃ to +125℃
ESD Classification ………………………………………… B
THERMAL INFORMATION
Parameter
Maximum
Thermal Resistance (Θjc)
SOT-23-5
160
Internal Power Dissipation (PD)
SOT-23-5
320
(ΔT = 100℃)
Maximum Junction Temperature
150
Maximum Lead Temperature (10 Sec)
300
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Unit
℃/W
℃/W
℃
℃
Page 3
CM2831
300mA CMOS LDO WITH ENABLE
ELECTRICAL CHARACTERISTICS
TA = +25℃; unless otherwise noted
Parameter
Symbol
Input Voltage
VIN
Output Voltage Accuracy
VOUT
Dropout Voltage
VDROPOUT
Output Current
IO
CM2831
Test Conditions
Min.
Typ.
Note 1
IO = 1mA
IO = 300mA,
VOUT=VO(NOM)-2%,
-1.5
Max.
7
V
1.5
%
1.2V<VO(NOM)<=2.0V
1300
2.0V<VO(NOM)<=2.5V
800
2.5V<VO(NOM)
Unit
mV
300
VOUT > 1.2V
300
300
mV
mA
Current Limit
ILIM
VOUT > 1.2V
Short Circuit Current
ISC
VOUT < 0.95V
150
450
300
mA
Quiescent Current
IQ
IO = 0mA
30
35
mA
Ground Pin Current
IGND
IO = 1mA to 300mA
30
50
µA
µA
Line Regulation
REGLINE
IOUT=5mA, VIN=VOUT+1 to VOUT+2
0.02
0.1
%
Load Regulation
REGLOAD
IO=1mA to 300mA
0.2
1
Over Temperature Shutdown
OTS
150
%
℃
Over Temperature Hysteresis
OTH
30
℃
VOUT Temperature Coefficient
TC
40
ppm/℃
Power Supply Rejection
PSRR
IO = 100mA
CO=2.2 µ F ceramic
PSRR
Output Voltage Noise
eN
Output Voltage Noise
eN
Shutdown Supply Current
EN Input Bias Current
EN Input Threshold
60
f=10kHz
50
f=100kHz
40
f=1kHz
75
CO=2.2 µ F ceramic
CBYP=0.01 µ F
f=10kHz
55
f=100kHz
30
f=10Hz to 100kHz
CO=2.2 µ F
30
IO = 100mA
Power Supply Rejection
f=1kHz
IO = 10mA, CBYP=0 µ F
f=10Hz to 100kHz
IO = 10mA, CBYP=0.01 µ F
CO=100 µ F
VIN=5.0V, VOUT=0V, VEN < VEL
VEN=VIN, VIN=2.6V to 7V
IEL
VEN=0, VIN=2.6V to 7V
VEH
VIN=2.6V to 7V
VEL
VIN=2.6V to 7V
µ Vrms
30
CO=100 µ F
ISD
dB
20
CO=2.2 µ F
IEH
dB
µ Vrms
20
3.0
µA
µA
µA
(Note2)
VIN
V
0
0.4
V
2.0
3.0
0.1
1.0
Note 1. VIN(MIN) = VOUT + VDROPOUT
Note 2. Based on our design architecture, the enable input threshold will depend on the input voltage. To ensure the stability of your design
application, please set the VEH (MIN) = VIN/2 + 0.8V.
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Page 4
CM2831
300mA CMOS LDO WITH ENABLE
DETAILED DESCRIPTION
The CM2831 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, thermal shutdown, and short circuit protection.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, short output protection, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current
and Thermal shutdown circuits become active when the junction temperature exceeds 150℃, or the current exceeds 300mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120℃.
The CM2831 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress. The CM2831 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. This
feature becomes active when the output drops below 1.05V, and reduces the current flow by 65%. Full current is restored when
the voltage exceeds 0.95V.
ENABLE
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all internal circuits are
powered down. In this state, the quiescent current is less than 2 µ A. This pin behaves much like an electronic switch.
EXTERNAL CAPACITOR
The CM2831 is stable with an output capacitor to ground of 2.2 µ F or greater. It can keep stable even with higher or poor ESR
capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be
larger than 0.1 µ F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground
termination is desirable.
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Page 5
CM2831
300mA CMOS LDO WITH ENABLE
TYPICAL ELECTRICAL CHARACTERISTICS
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Page 6
CM2831
300mA CMOS LDO WITH ENABLE
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Page 7
CM2831
300mA CMOS LDO WITH ENABLE
2004/04/30 Rev. 1.6
Champion Microelectronic Corporation
Page 8
CM2831
300mA CMOS LDO WITH ENABLE
PACKAGE DIMENSION
SOT-23-5 (M25)
D
5
4
b1
With Plating
c
c1
A
A1
E
E1
A2
b
b
Base Metal
b1
c
Section B-B
c1
D
E
1
2
3
e
E1
b
L
e1
L1
e
θ1
e1
θ
θ1
θ
A2
A
θ2
θ2
A1
L
2004/04/30 Rev. 1.6
See Section B-B
L1
Champion Microelectronic Corporation
Page 9
CM2831
300mA CMOS LDO WITH ENABLE
NUMBERING SCHEME
Ordering Number: CM2831XYZ (note1)
Ordering Number: CM2831GXYZ (note2)
note1:
CM2831 : 300mA CMOS LDO with enable
X : Suffix for voltage output (note 3)
Y : Suffix for Temperature Range (note 4)
Z : Suffix for Package Type (note 5)
note2:
CM2831 : 300mA CMOS LDO with enable
G: Suffix for Pb Free Product
X : Suffix for voltage output (note 3)
Y : Suffix for Temperature Range (note 4)
Z : Suffix for Package Type (note 5)
note 3: see CMOS LDO Voltage Suffix Table
CM2831 will provide options of A(1.5V), D (1.8V), E(1.9V),, H(2.2V), K(2.5V), M(2.7V), N(2.8V), O(2.9V), P(3.0V), S(3.3V),
U(3.5V), V(3.6V), X(3.8V)
note 4:
Y= I : -40℃~+85℃
(only I grade support for all CMOS LDOs)
note 5:
Z is single alphabet with or without digits
M25 : SOT-25 (TR only)
CMOS LDO Voltage Suffix Table
Output Voltage
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
2004/04/30 Rev. 1.6
Suffix
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Output Voltage
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
Champion Microelectronic Corporation
Suffix
P
Q
R
S
T
U
V
W
X
Y
Z
Page 10
CM2831
300mA CMOS LDO WITH ENABLE
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
11F, No. 306-3, SEC. 1, Ta Tung Road,
Hsichih, Taipei Hsien 221, Taiwan
2004/04/30 Rev. 1.6
T E L : +886-2-8692 1591
F A X : +886-2-8692 1596
Champion Microelectronic Corporation
Page 11