150mA Ultra Low Dropout, Low
Noise Micropower Linear Regulator
POWER MANAGEMENT
Description
The SC5205 is a 150mA 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.
The SC5205 uses a Semtech proprietary internal PNP
device for the pass element, providing a low dropout
voltage of 165mV at a load of 150mA, while maintaining
a ground pin current of 2750µA.
The output noise is reduced by placing a 10nF capacitor
on pin 4 (bypass).
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 SC5205 is packaged in a 5 pin SOT-23 surface mount
package for a very small footprint and it requires only a
1µF capacitor on the output and a 0.01µF on the bypass
pin for a minimum amount of external components.
SC5205
Features
Ultra low dropout voltage - 165mV @ 150mA
Guaranteed 150mA output current
Low ground pin current at all loads
<5µA quiescent current in shutdown
Wide input supply voltage range 2.5V to 16V in
Wide output voltage range
Excellent line regulation
Industrial temperature range
Surface mount packaging (5 pin SOT-23)
Lead-free packaging available, fully WEEE and
RoHS compliant
Applications
Battery Powered Systems
Cellular Telephones
Cordless Telephones
Pagers
Personal Digital Assistants
Portable Instrumentation
Cameras
Portable Consumer Equipment
PCMCIA cards
Typical Application Circuit
1
VIN
2
3
+
C1
1uF
U1 SC5205
VIN
GND
EN
BYP
4
+
C3
1uF
VO
5
VO
EN
C2
10nF
Notes:
(1) C
IN
(C1) is needed if the device is far from the supply’s filter capacitors, or for operation from a battery. A value
of 1.0µF or greater should be used. C
IN
may be tantalum or aluminum electrolytic.
(2) C
O
(C3) should be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will
improve the overall transient response.
(3) C
BYP
(C2 - required) should be placed as close as possible to pin 4 and ground. A 10nF ceramic capacitor is
recommended.
(4) EN may be tied to V
IN
if the shutdown feature is not required. Maximum EN voltage = V
IN
.
Revision: March 8, 2006
1
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SC5205
POWER MANAGEMENT
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may
affect device reliability.
Parameter
Input Supply Voltage
Power Dissipation
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)
Symbol
VIN
P
D
θ
J A
θ
J C
T
A
T
J
T
STG
T
LEAD
V
ESD
Limits
-0.3 to +20
Internally Limited
256
81
-40 to +85
-40 to +125
-65 to +150
300
2
Units
V
W
°C/W
°C/W
°C
°C
°C
°C
kV
Electrical Characteristics
Unless specified: VIN = VO
(NOM)
+ 1V, I
O
= 100µA, C
BYP
= 10nF, C
O
= 1µF, V
ENABLE
≥
1.8V. Values in
bold
apply over the full operating temperature range.
Parameter
Supply Voltage Range
Output Voltage
Symbol
VIN
VO
Test Conditions
Min
2.5
-1%
-3%
Typ
Max
16
Units
V
V
VO
+1%
+3%
Output Voltage
Temperature Coefficient
Line Regulation
TC
REG
(LINE)
VIN = (VO
(NOM)
+ 1V) to 16V
40
0.06
0.12
0.15
ppm/°C
%/V
Load Regulation
REG
(LOAD)
I
O
= 0.1mA to 150mA
0.001
0.004
0.007
%/mA
Dropout Voltage
(1)
V
D
I
O
= 100µA
5
10
25
mV
I
O
= 50mA
100
150
200
mV
I
O
= 100mA
140
200
250
mV
I
O
= 150mA
165
250
300
mV
2006 Semtech Corp.
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SC5205
POWER MANAGEMENT
Pin Configuration
Top View
Ordering Information
Device
(1)(2)
SC5205-X.XCSKTR
SC5205-X.XCSKTRT
(3)
P ackag e
5 pin SOT-23
SOT-23-5
Block Diagram
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.
(3) Lead free packaging. This product is fully WEEE and
RoHS compliant.
Pin Descriptions
Pin
1
2
3
4
5
Pin Name
VIN
GND
EN
BYP
VO
Pin Function
Supply voltage input.
Ground.
Active high enable input. Connect to VIN if not being used.
Reference bypass. Connect a 10nF capacitor (required) between this pin and GND to reduce
output noise
Voltage output.
2006 Semtech Corp.
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SC5205
POWER MANAGEMENT
Outline Drawing - SOT-23-5
A
e1
N
EI
D
DIMENSIONS
INCHES
MILLIMETERS
DIM
MIN NOM MAX MIN NOM MAX
A
A1
A2
b
c
D
E1
E
e
e1
L
L1
N
01
aaa
bbb
ccc
A
H
.035
.000
.035
.010
.003
.110
.060
-
-
.045
-
-
.057
.006
.051
.020
.009
.118
.069
0.90
0.00
.90
0.25
0.08
2.80
1.50
-
-
1.15
-
-
1.45
0.15
1.30
0.50
0.22
3.00
1.75
2X E/2
E
1
ccc C
2X N/2 TIPS
2
e
B
D
aaa C
A2
SEATING PLANE
.114
.063
.110 BSC
.037 BSC
.075 BSC
.012 .018 .024
(.024)
5
-
10°
0°
.004
.008
.008
2.90
1.60
2.80 BSC
0.95 BSC
1.90 BSC
0.30 0.45 0.60
(0.60)
5
-
0°
10°
0.10
0.20
0.20
C
A1
bxN
bbb
C A-B D
GAGE
PLANE
0.25
L
(L1)
c
01
SEE DETAIL
SIDE VIEW
A
DETAIL
A
NOTES:
1.
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H-
3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
OR GATE BURRS.
Land Pattern - SOT-23-5
X
DIM
(C)
G
Y
P
NOTES:
1.
DIMENSIONS
MILLIMETERS
INCHES
(.098)
.055
.037
.024
.043
.141
(2.50)
1.40
0.95
0.60
1.10
3.60
Z
C
G
P
X
Y
Z
THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
Contact Information for Semtech International AG
Taiw an Branch
Korea Branch
Shanghai Office
Tel: 886-2-2748-3380
Fax: 886-2-2748-3390
Tel: 82-2-527-4377
Fax: 82-2-527-4376
Tel: 86-21-6391-0830
Fax: 86-21-6391-0831
Semtech Sw itz erland GmbH
Japan Branch
Semtech Limited (U.K.)
Semtech France SARL
Semtech Germany GmbH
Tel: 81-3-6408-0950
Fax: 81-3-6408-0951
Tel: 44-1794-527-600
Fax: 44-1794-527-601
Tel: 33-(0)169-28-22-00
Fax: 33-(0)169-28-12-98
Tel: 49-(0)8161-140-123
Fax: 49-(0)8161-140-124
www.semtech.com
Semtech International AG is a wholly-owned subsidiary of
Semtech Corporation, which has its headquarters in the U.S.A.
2006 Semtech Corp.
5
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