SC2982CSK-3.6TRT [SEMTECH]
Fixed Positive LDO Regulator, 3.6V, 0.2V Dropout, PDSO5, SOT-23, 5 PIN;
| 型号： | SC2982CSK-3.6TRT |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | Fixed Positive LDO Regulator, 3.6V, 0.2V Dropout, PDSO5, SOT-23, 5 PIN 光电二极管 |
| 文件： | 总5页 (文件大小：133K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SC2982
50mA Ultra Low Dropout, Low
Noise Micropower Linear Regulator
PRELIMINARY
POWER MANAGEMENT
Description
Features
The SC2982 is a 50mA ultra low dropout linear
regulator with a built in CMOS/TTL logic level enable
switch. It is designed specifically for battery powered
applications where low quiescent current and low
dropout are critical for battery longevity.
u Ultra low dropout voltage - 100mV @ 50mA
u Guaranteed 50mA output current
u Low ground pin current at all loads
u <1µA quiescent current in shutdown
u Wide input supply voltage range 2.5V to 16V
u Wide output voltage range
u Excellent line regulation
u Industrial temperature range
u Surface mount packaging (5 pin SOT-23)
The SC2982 uses a Semtech proprietary internal PNP
device for the pass element, providing a low dropout
voltage of 100mV at a load of 50mA, while maintaining a
ground pin current of 600µA.
Applications
The output noise is reduced by placing a 10nF capacitor
on pin 4 (bypass).
u Battery Powered Systems
u Cellular Telephones
u Cordless Telephones
u Pagers
u Personal Digital Assistants
u Portable Instrumentation
u Cameras
Each device contains a bandgap reference, error
amplifier, PNP pass element, thermal and current
limiting circuitry and resistor divider network for setting
output voltage.
The SC2982 is packaged in a 5 pin SOT-23 surface mount
package for a very small footprint and requires only a
1µF capacitor on the output for a minimum number of
external components.
u Portable Consumer Equipment
u PCMCIA Cards
Typical Application Circuit
U1 SC2982
1
5
4
VIN
VO
VIN
VO
2
GND
3
EN
BYP
EN
C
IN
1uF
Co
1uF
+
+
C
BYP
10nF
Notes:
(1) CIN is needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value of 1µF
or greater should be used. CIN may be a tantalum or aluminum electrolytic capacitor.
(2) CO should be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will improve
the overall transient response. Due to their very low ESR, ceramic capacitors should not be used.
(3) CBYP should be placed as close as possible to pin 4 and ground. A 10nF ceramic capacitor is recommended.
(4) EN should be tied to VIN if the shutdown feature is not required. Maximum EN voltage = VIN.
Revision 1, January 2001
1
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SC2982
POWER MANAGEMENT
PRELIMINARY
Absolute Maximum Ratings
Parameter
Symbol
VIN
PD
Maximum
Units
V
Input Supply Voltage
-0.3 to +20
Internally Limited
256
Power Dissipation
W
Thermal Resistance Junction to Ambient
Thermal Resistance Junction to Case
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec
ESD Rating (Human Body Model)
°C/W
°C/W
°C
qJA
81
qJC
TA
-40 to +85
-40 to +125
-65 to +150
300
TJ
°C
TSTG
TLEAD
VESD
°C
°C
2
kV
Electrical Characteristics
Unless specified: VIN = VO(NOM) + 1V, IO = 100µA, CO = 1µF, VEN ³ 1.8V. Values in bold apply over the full operating temperature range.
Parameter
Symbol
VIN
Test Conditions
Min
2.5
-1
Typ
Max
16
Units
V
Supply Voltage Range
Output Voltage
VO
+1
%
-3
+3
Output Voltage Temperature
Coefficient
TC
40
ppm/°C
%/V
Line Regulation
Load Regulation
Dropout Voltage(1)
REG(LINE)
VIN = (VO(NOM) + 1V) to 16V
IO = 0.1mA to 50mA
IO = 100µA
0.06
0.12
0.15
REG(LOAD)
0.001 0.004 %/mA
0.007
VD
5
10
25
mV
mV
µA
IO = 50mA
100
80
150
200
125
Ground Pin Current
IGND
IO = 100µA
150
1000
1500
5
IO = 50mA
600
µA
µA
VEN < 0.4V (shutdown)
0.01
ã 2001 Semtech Corp.
2
www.semtech.com
SC2982
POWER MANAGEMENT
PRELIMINARY
Electrical Characteristics
Unless specified: VIN = VO(NOM) + 1V, IO = 100µA, CO = 1µF, VEN ³ 1.8V. Values in bold apply over the full operating temperature range.
Parameter
Symbol
ILIM
Test Conditions
Min
200
Typ
Max
Units
mA
Current Limit(2)
VO > (VO(NOM) - 5%)
Ripple Rejection Ratio
PSRR
IO = 100µA, f = 100Hz, CBYP = 10nF,
CO = 10µF
50
0.05
30
db
∆VO (%)
Thermal Regulation
RMS Output Noise
Enable Input Voltage
%/W
PD
eno
BW = 300Hz to 50kHz, IO = 1mA,
CBYP = 10nF, CO = 10µF
µVrms
VEN
Low = O/P OFF
High = O/P ON
VEN £ 0.4V
0.4
V
V
1.8
Enable Input Current
IEN
-0.01
5
-1
10
20
µA
µA
VEN ³ 1.8V
Notes:
(1) Defined as the input to output differential at which the output voltage drops 100mV below the value measured
at a differential of 1V.
(2) As the load resistance further decreases, the SC2982 folds back the output current to approximately 150mA at
VO = 0V.
ã 2001 Semtech Corp.
3
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SC2982
POWER MANAGEMENT
PRELIMINARY
Pin Configuration
Ordering Information
Device
Package
SC2982CSK-X.XTR(1)(2)
5 pin SOT-23
Notes:
(1) Where -X.X denotes voltage options. Available
voltages are: 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,
4.0V and 5.0V.
(2) Only available in tape and reel packaging. A reel
contains 3000 devices.
Block Diagram
Pin Descriptions
Pin
Pin Name Pin Function
1
2
3
4
5
VIN
GND
EN
Supply voltage input.
Ground.
Active high enable input. Connect to VIN if not being used.
Reference bypass. Connect a 10nF capacitor between this pin and GND to reduce output noise
Voltage output.
BYP
VO
ã 2001 Semtech Corp.
4
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SC2982
POWER MANAGEMENT
PRELIMINARY
Outline Drawing - SOT-23-5
Land Pattern - SOT-23-5
Contact Information
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
ã 2001 Semtech Corp.
5
www.semtech.com
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