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Электронный компонент: SC5205-3.6CSKTR

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1
www.semtech.com
SC5205
150mA Ultra Low Dropout, Low
Noise Micropower Linear Regulator
POWER MANAGEMENT
PRELIMINARY
Revision 1, January 2001
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 2750A.
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
1F capacitor on the output and a 0.01F on the bypass
pin for a minimum amount of external components.
u
Ultra low dropout voltage - 165mV @ 150mA
u
Guaranteed 150mA output current
u
Low ground pin current at all loads
u
<5A quiescent current in shutdown
u
Wide input supply voltage range 2.5V to 16V in
u
Wide output voltage range
u
Excellent line regulation
u
Industrial temperature range
u
Surface mount packaging (5 pin SOT-23)
u
Battery Powered Systems
u
Cellular Telephones
u
Cordless Telephones
u
Pagers
u
Personal Digital Assistants
u
Portable Instrumentation
u
Cameras
u
Portable Consumer Equipment
u
PCMCIA cards
EN
VIN
VO
+
C1
1uF
U1
SC5205
1
2
3
4
5
VIN
GND
EN
BYP
VO
+
C3
1uF
C2
10nF
Description
Features
Applications
Typical Application Circuit
Notes:
(1) C
IN
(C1) is needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value
of 1.0F or greater should be used. C
IN
may be tantalum or aluminum electrolytic.
(2) C
O
(C3) should be a 1F 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
.
2
2001 Semtech Corp.
www.semtech.com
SC5205
POWER MANAGEMENT
PRELIMINARY
Unless specified: VIN = VO
(NOM)
+ 1V, I
O
= 100A, C
BYP
= 10nF, C
O
= 1F, V
ENABLE
1.8V. Values in bold apply over the full operating temperature range.
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Electrical Characteristics
3
2001 Semtech Corp.
www.semtech.com
SC5205
POWER MANAGEMENT
PRELIMINARY
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Unless specified: VIN = VO
(NOM)
+ 1V, I
O
= 100A, C
BYP
= 10nF, C
O
= 1F, V
ENABLE
1.8V. Values in bold apply over the full operating temperature range.
Electrical Characteristics (Cont.)
Notes:
(1) Defined as the input to output differential at which the output voltage drops to 2% below the value measured at
a differential of 1V.
(2) As the load resistance further decreases, the SC5205 folds back the output current to approximately 150mA at
V
O
= 0V.
Hz
nV
4
2001 Semtech Corp.
www.semtech.com
SC5205
POWER MANAGEMENT
PRELIMINARY
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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.
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Pin Configuration
Ordering Information
Block Diagram
Pin Descriptions
Top View
SOT-23-5
5
2001 Semtech Corp.
www.semtech.com
SC5205
POWER MANAGEMENT
PRELIMINARY
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
Contact Information
Outline Drawing - SOT-23-5
Land Pattern - SOT-23-5