ETC CM2838 300ma low esr cmos ldo with enable Datasheet

CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
GENERAL DESCRIPTION
FEATURES
The CM2838 family is a positive voltage linear regulator
Very Low Dropout Voltage
developed utilizing CMOS technology featured low quiescent
Low Current Consumption: Typ. 30µA, Max. 35µA
current (30µA typ.), low dropout voltage, and high output
Output Voltage: 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V
voltage accuracy, making them ideal for battery applications.
High Accuracy Output Voltage: +/- 1.5%
EN input connected to CMOS has low bias current. The
Guaranteed 300mA Output
space-saving SOT-23-5 package is attractive for “Pocket” and
Input Range up to 7.0V
“Hand Held” applications.
Thermal Shutdown
Current Limiting
These rugged devices have both Thermal Shutdown, and
Stability with Low ESR Capacitors
Current limit to prevent device failure under the “Worst” of
Compact Package: SOT-23-5
operating conditions.
Factory Pre-set Output Voltages
Low Temperature Coefficient
In application requiring a low noise, regulated supply, place a
1000pF capacitor between Bypass and Ground.
The CM2838 is stable with a Low ESR output capacitance of
1.0µF or greater.
APPLICATIONS
Battery-powered devices
Personal communication devices
Home electric/electronic appliances
PC peripherals
TYPICAL APPLICATIONS
IN
IN
C M 2838
BYP
GND
5V
2004/05/01 Preliminary
C1
1uF
Rev. 1.1
OUT
OUT
EN
C2
1nF
C3
1.0uF
Champion Microelectronic Corporation
Page 1
CM2838
300mA LOW ESR 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
2004/05/01 Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Page 2
CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
ORDERING INFORMATION
Part Number
CM2838DIM25
CM2838KIM25
CM2838NIM25
CM2838PIM25
CM2838SIM25
CM2838GDIM25
CM2838GKIM25
CM2838GNIM25
CM2838GPIM25
CM2838GSIM25
Output Voltage
1.8V
2.5V
2.8V
3.0V
3.3V
1.8V
2.5V
2.8V
3.0V
3.3V
Temperature Range
-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
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
…………………….……
Output Voltage
…………………… GND-0.3V to VIN+0.3V
PD / (VIN - Vo) mA
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
250
(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.
2004/05/01 Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Unit
℃/W
mW
℃
℃
Page 3
CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
ELECTRICAL CHARACTERISTICS
TA = +25℃; unless otherwise noted
Parameter
Symbol
Input Voltage
VIN
Output Voltage Accuracy
VOUT
CM2838
Test Conditions
Min.
Typ.
Note 1
IO = 1mA to 300mA
-1.5
1.2V<VO(NOM) ≤ 2.0V
IO = 300mA,
Unit
7
V
1.5
%
1300
2.0V<VO(NOM) ≤ 2.5V
Dropout Voltage
VDROPOUT
Output Current
IO
VOUT > 1.2V
300
300
VOUT=VO(NOM)-1.5%,
Max.
mV
800
2.5V<VO(NOM)
300
mA
Current Limit
ILIM
VOUT > 1.2V
Quiescent Current
IQ
IO = 0mA
30
35
μA
Ground Pin Current
IGND
IO = 1mA to 300mA
30
50
μA
0.02
0.1
%
0.2
1
mA
Line Regulation
REGLINE
IOUT=5mA, VIN=VOUT+1 to VOUT+2
Load Regulation
REGLOAD
IO=1mA to 300mA
Over Temperature Shutdown
OTS
150
%
℃
Over Temperature Hysteresis
OTH
30
℃
VOUT Temperature Coefficient
TC
40
ppm/℃
Power Supply Rejection
PSRR
Power Supply Rejection
PSRR
IO = 100mA
CO=2.2µF ceramic
f=1kHz
60
f=10kHz
50
f=100kHz
40
IO = 100mA
f=1kHz
75
CO=2.2µF ceramic
f=10kHz
55
CBYP=0.01µF
f=100kHz
30
f=10Hz to 100kHz
CO=2.2µF
30
IO = 10mA, CBYP=0µF
CO=100µF
20
f=10Hz to 100kHz
CO=2.2µF
30
IO = 10mA, CBYP=0.01µF
CO=100µF
20
Output Voltage Noise
eN
Output Voltage Noise
eN
Shutdown Supply Current
ISD
VIN=5.0V, VOUT=0V, VEN < VEL
IEH
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
EN Input Bias Current
EN Input Threshold
-0.1
450
dB
dB
μVrms
μVrms
2.0
3.0
μA
0.1
μA
2.0
3.0
μA
2
VIN
V
0
0.4
V
Note 1. VIN(MIN) = VOUT + VDROPOUT
2004/05/01 Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Page 4
CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
DETAILED DESCRIPTION
The CM2838 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, thermal shutdown.
The P-channel pass transistor receives data from the error amplifier, over-current 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 CM2838 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress.
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 2µA. This pin behaves much like an electronic switch.
EXTERNAL CAPACITOR
The CM2838 is stable with a Low ESR output capacitor to ground of 1.0µF or greater. It can keep stable even with higher ESR
capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be
larger than 0.1µF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground
termination is desirable.
2004/05/01 Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Page 5
CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
TYPICAL CHARACTERISTICS
2004/05/01 Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Page 6
CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
2004/05/01 Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Page 7
CM2838
300mA LOW ESR 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
2004/05/01 Preliminary
Rev. 1.1
See Section B-B
L1
Champion Microelectronic Corporation
Page 8
CM2838
300mA LOW ESR CMOS LDO WITH ENABLE
NUMBERING SCHEME
Ordering Number: CM2838XYZ (note1)
Ordering Number: CM2838GXYZ (note2)
note1:
CM2838: 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:
CM2838: 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
CM2838 will provide options of D(1.8V), K(2.5V), N(2.8V), P(3.0V), S(3.3V)
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
2004/05/01 Preliminary
Rev. 1.1
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 9
CM2838
300mA LOW ESR 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
2004/05/01 Preliminary
Rev. 1.1
T E L : +886-2-8692 1591
F A X : +886-2-8692 1596
Champion Microelectronic Corporation
Page 10
Similar pages