Datasheet SC5205-3.8CSKTR, SC5205-4.0CSKTR, SC5205-5.0CSKTR, SC5205-1.8CSKTR, SC5205-2.5CSKTR Datasheet (Semtech Corporation)
...Page 1
SC5205
150mA Ultra Low Dropout, Low
Noise Micropower Linear Regulator
POWER MANAGEMENT PRELIMINARY
Description Features
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.
u Ultra low dropout voltage - 165mV @ 150mA
u Guaranteed 150mA output current
u Low ground pin current at all loads
u <5µA 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)
Applications
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
Typical Application Circuit
U1 SC5205
1
VIN VO
EN
C1
+
1uF
VIN
2
GND
3 4
EN BYP
Notes:
(1) CIN (C1) is needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value
of 1.0µF or greater should be used. CIN may be tantalum or aluminum electrolytic.
(2) CO (C3) should be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will
improve the overall transient response.
(3) C
(C2 - required) should be placed as close as possible to pin 4 and ground. A 10nF ceramic capacitor is
BYP
recommended.
(4) EN may be tied to VIN if the shutdown feature is not required. Maximum EN voltage = VIN.
Revision 1, January 2001
5
VO
C3
+
C2
10nF
1 www.semtech.com
1uF
Page 2
SC5205
POWER MANAGEMENT PRELIMINARY
Absolute Maximum Ratings
retemaraPlobmySstimiLstinU
egatloVylppuStupnINIV02+ot3.0-V
noitapissiDrewoPP
egnaRerutarepmeTegarotST
Electrical Characteristics
Unless specified: VIN = VO
retemaraPlobmySsnoitidnoCtseTniMpyTxaMstinU
egatloVtuptuOOV%1-OV%1+V
+ 1V, IO = 100µA, C
(NOM)
egnaRegatloVylppuSNIV 5.261 V
D
tneibmAotnoitcnuJecnatsiseRlamrehT
esaCotnoitcnuJecnatsiseRlamrehT
egnaRerutarepmeTtneibmAgnitarepOT
egnaRerutarepmeTnoitcnuJgnitarepOT
ces01)gniredloS(erutarepmeTdaeLT
)ledoMydoBnamuH(gnitaRDSEV
= 10nF, CO = 1µF, V
BYP
q
AJ
q
CJ
A
J
GTS
DAEL
DSE
³ 1.8V. Values in bold apply over the full operating temperature range.
ENABLE
4-58+ot0C°
4-521+ot0C°
2Vk
detimiLyllanretnIW
652W/C°
18W/C°
051+ot56-C°
003C°
%3-%3+
egatloVtuptuO
tneiciffeoCerutarepmeT
noitalugeReniLGER
noitalugeRdaoLGER
)1(
egatloVtuoporD
CT04C°/mpp
)ENIL(
OV(=NIV
)MON(
V61ot)V1+60.021.0V/%
51.0
)DAOL(
I
O
Am051otAm1.0=100.0400.0Am/%
700.0
V
D
I
O
Aµ001=501Vm
52
I
O
Am05=001051Vm
002
I
O
Am001=041002Vm
052
I
O
Am051=561052Vm
003
2ã 2001 Semtech Corp. www.semtech.com
Page 3
SC5205
POWER MANAGEMENT PRELIMINARY
Electrical Characteristics (Cont.)
Unless specified: VIN = VO
retemaraPlobmySsnoitidnoCtseTniMpyTxaMstinU
tnerruCniPdnuorGI
)2(
timiLtnerruC
noitalugeRlamrehT 50.0W/%
+ 1V, IO = 100µA, C
(NOM)
DNG
I
MIL
oitaRnoitcejeRelppiRRRSPI
= 10nF, CO = 1µF, V
BYP
V
O
³ 1.8V. Values in bold apply over the full operating temperature range.
ENABLE
I
O
I
O
I
O
I
O
NE
Aµ001=08521Aµ
Am05=0060001Aµ
Am001=00610012Aµ
Am051=05720033Aµ
OV(>OV
)MON(
VO∆
P
D
051
0051
0062
0004
)nwodtuhs(V4.0<10.0 5 Aµ
)%5-003 005 Am
zH001=f,Aµ001=05Bd
esioNtuptuOSMRe
egatloVtupnIelbanEV
n
NE
I
O
C,Am05=
PYB
C,Fn01=
O
,Fµ2.2=
012
zHk99otzH01=WB
FFOP/O=woL 4.0 V
nV
Hz
NOP/O=hgiH 8.1
tnerruCtupnIelbanEI
NE
VNE£ V4.010.0- 1- Aµ
V
³ V8.1501Aµ
NE
02
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
VO = 0V.
3ã 2001 Semtech Corp. www.semtech.com
Page 4
SC5205
POWER MANAGEMENT PRELIMINARY
Pin Configuration Ordering Information
Block Diagram
Top View
SOT-23-5
eciveDegakcaP
)2()1(
RTKSCX.X-5025CS
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.
32-TOSnip5
Pin Descriptions
niPemaNniPnoitcnuFniP
1NIV.tupniegatlovylppuS
2DNG.dnuorG
3NE.desugniebtonfiNIVottcennoC.tupnielbanehgihevitcA
4PYB ecuderotDNGdnanipsihtneewteb)deriuqer(roticapacFn01atcennoC.ssapybecnerefeR
5OV.tuptuoegatloV
esiontuptuo
4ã 2001 Semtech Corp. www.semtech.com
Page 5
SC5205
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
5ã 2001 Semtech Corp. www.semtech.com
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