Transcript
CM2835 300mA CMOS LDO GENERAL DESCRIPTION
FEATURES
The CM2835 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, 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 and SOT-89 package is attractive for
Input Range up to 7.0V
“Pocket” and “Hand Held” applications.
Thermal Shutdown
Current Limiting
Stability with Low ESR Capacitors
Current limit to prevent device failure under the “Worst” of
Compact Package: SOT-23, SOT-89
operating conditions.
Factory Pre-set Output Voltages
Low Temperature Coefficient
These rugged devices have both Thermal Shutdown, and
The CM2835 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
CM2835 IN
IN
OUT
OUT GND
5V
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C1 1uF
Champion Microelectronic Corporation
C2 1.0uF
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CM2835 300mA CMOS LDO PIN CONFIGURATION SOT-23 Top View
SOT-89 Top View
GND
VOUT
GND
VIN
VOUT
1
2
1
2
3
VIN
3
BLOCK DIAGRAM IN
OUT
Overcurrent Shutdown
Thermal Shutdown
R1
AMP
+ Vref = 1.176V
R2
GND
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CM2835 300mA CMOS LDO ORDERING INFORMATION Part Number CM2835DIM23 CM2835DIM89 CM2835KIM23 CM2835KIM89 CM2835PIM23 CM2835PIM89 CM2835SIM23 CM2835SIM89 CM2835GDIM23 CM2835GDIM89 CM2835GKIM23 CM2835GKIM89 CM2835GNIM23 CM2835GNIM89 CM2835GPIM23 CM2835GPIM89 CM2835GSIM23 CM2835GSIM89
Output Voltage 1.8V 1.8V 2.5V 2.5V 3.0V 3.0V 3.3V 3.3V
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℃
1.8V 1.8V 2.5V 2.5V 2.8V 2.8V 3.0V 3.0V 3.3V 3.3V
Package SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89
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 PD / (VIN - Vo) mA
Output Current
…………………….……
Output Voltage
…………………… GND-0.3V to VIN+0.3V
Junction Temperature Range
…..…..... -40℃ to +150℃
ESD Classification ………………………………………… B
THERMAL INFORMATION Parameter Thermal Resistance (Θjc) Thermal Resistance (Θja)
SOT-23 SOT-89 SOT-23 SOT-89 SOT-23 SOT-89
Maximum 170 100 330 300 225 400 150 300
Internal Power Dissipation (PD) (ΔT = 100℃) Maximum Junction Temperature Maximum Lead Temperature (10 Sec) *With Junction sink capable of twice times ofΘjc Caution: Stress above the listed absolute rating may cause permanent damage to the device.
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Unit ℃/W ℃/W mW ℃ ℃
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CM2835 300mA CMOS LDO ELECTRICAL CHARACTERISTICS TA = +25℃; unless otherwise noted
Parameter
Symbol
Input Voltage
VIN
Output Voltage Accuracy
VOUT
CM2835
Test Conditions
Min.
Typ.
Note 1 IO = 1mA to 300mA
-1.5
1.2V 1.2V
300 300
VOUT=VO(NOM)-1.5%,
Max.
mV
400 300
2.5V 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
Output Voltage Noise
eN
Output Voltage Noise
eN
IO = 100mA CO=2.2μF ceramic
-0.1
450
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
dB
dB
μVrms μVrms
Note 1. VIN(MIN) = VOUT + VDROPOUT
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CM2835 300mA CMOS LDO DETAILED DESCRIPTION The CM2835 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 CM2835 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress.
EXTERNAL CAPACITOR The CM2835 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.
TYPICAL CHARACTERISTICS
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CM2835 300mA CMOS LDO
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CM2835 300mA CMOS LDO PACKAGE DIMENSION SOT-23 (M23) D 3
b1
With Plating
c
c1
A A1
E1
E
A2
b
b
Base Metal
b1 c
Section B-B
c1 D E 1
2
e
E1
b
e1
L L1 e
θ1
e1
θ θ1
θ
A2
A
θ2
θ2 A1
L See Section B-B
L1
SOT-89 (M89) D D1
L
5°
H
E
φ1.0
C e e1
A
8°
L b b1 C D D1 H E e1
b
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b1
b
e
Champion Microelectronic Corporation
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CM2835 300mA CMOS LDO NUMBERING SCHEME Ordering Number: CM2835XYZ (note1) Ordering Number: CM2835GXYZ (note2) note1: CM2835: 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: CM2835: 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 CM2835 will provide options of D(1.8V), K(2.5V), 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 M23 : SOT-23 (TR only) M89 : SOT-89 (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
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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
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CM2835 300mA CMOS LDO 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
2006/10/11 Rev1.4
T E L : +886-2-2788 0558 F A X : +886-2-2788 2985
Champion Microelectronic Corporation
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