Datasheet SC1453-15ISKTR, SC1453-18ISKTR, SC1453-25ISKTR, SC1453-27ISKTR, SC1453-28ISKTR Datasheet (Semtech Corporation)
...Page 1
POWER MANAGEMENT
1
www.semtech.com
SC1453
150mA Ultra Low Dropout
Regulator with Low Noise Bypass
Features
Revision 2, December 2000
PRELIMINARY
Description
The SC1453 is a low dropout linear regulator that operates from a +2.5V to +6.5V input range and delivers up
to 150mA. A PMOS pass transistor allows the low 75µA
supply current to remain independent of load, making
these devices ideal for battery operated portable
equipment such as cellular phones, cordless phones and
personal digital assistants.
The SC1453 has a bandgap reference bypass pin for
very low noise operation - a 10nF (typ.) capacitor is
connected between this pin and ground. Other features
include low powered shutdown, short circuit protection,
thermal shutdown protection and reverse battery
protection. The SC1453 comes in the tiny 5 lead SOT-23
package.
u Battery Powered Systems
u Cellular Telephones
u Cordless Telephones
u Personal Digital Assistants
u Portable Instrumentation
u Modems
u PCMCIA cards
u 2982/5205 compatible pinout
u Guaranteed 150 mA output current
u Very small external components - designed to work
with ceramic capacitors
u Low 25µV
RMS
output noise
u Very low supply current
u Thermal overload protection
u Reverse battery protection
u Low power shutdown
u Full industrial temperature range
u Surface mount packaging (5 pin SOT-23)
VIN VOUT
C3
1uF
C1
1uF
U1 SC1453
1
2
3 4
5
IN
GND
EN BYP
OUT
C2
10nF
Applications
Typical Application Circuit
Page 2
2ã 2000 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1453
PRELIMINARY
Absolute Maximum Ratings
retemaraPlobmySmumixaMstinU
egatloVylppuStupnIV
NI
7+ot6.0-V
tneibmAotnoitcnuJecnatsiseRlamrehT
q
AJ
652W/C°
esaCotnoitcnuJecnatsiseRlamrehT
q
CJ
18W/C°
egnaRerutarepmeTtneibmAgnitarepOT
A
58+ot04-C°
egnaRerutarepmeTnoitcnuJgnitarepOT
J
521+ot04-C°
egnaRerutarepmeTegarotST
GTS
051ot56-C°
.ceS01)gniredloS(erutarepmeTdaeLT
DAEL
003C°
gnitaRDSEDSE2Vk
Unless specified: VIN = V
OUT
+ 1V, V
EN
= VIN, I
OUT
= 100µA, TA = 25°C. Values in bold apply over full operating ambient temperature range.
retemaraPlobmySsnoitidnoCniMpyTxaMstinU
NI
egnaRegatloVylppuSV
NI
52.205.6 V
tnerruCylppuSI
Q
I
TUO
Am051otam0=57031Aµ
061
V
NI
V,V5.6=
NE
V0=1.00.1Aµ
5.1
TUO
egatloVtuptuO
)1(
V
TUO
I
TUO
Am1=%5.1-V
TUO
%5.1+V
Am0 £ I
TUO
£ V,Am051
TUO
V1+ £ VNI£ V5.5 %0.3-%0.3+
noitalugeReniL
)1(
GER
)ENIL(
V(
)MON(TUO
)V1.0+ £ VNI£ I,V5.5
TUO
Am1=5.201Vm
21
noitalugeRdaoL
)1(
GER
)DAOL(
I
TUO
Am051otAm1.0=5-02-Vm
03-
Electrical Characteristics
Page 3
3
ã 2000 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1453
PRELIMINARY
Unless specified: VIN = V
OUT
+ 1V, V
EN
= VIN, I
OUT
= 100µA, TA = 25°C. Values in bold apply over full operating ambient temperature range.
retemaraPlobmySsnoitidnoCniMpyTxaMstinU
).tnoC(tuO
timiLtnerruCI
MIL
004 Am
egatloVtuoporD
)2()1(
V
D
I
TUO
Am1=1Vm
I
TUO
Am05=0507Vm
09
I
TUO
Am001=001041Vm
081
I
TUO
Am051=051012Vm
072
esioNegatloVtuptuOe
n
I,zHk001otzH01
TUO
Am1=
C
PYB
C,Fn01=
TUO
Fµ1=
54Vµ
SMR
C
TUO
Fµ001=52
oitaRnoitcejeRylppuSrewoPRRSPC,zH021=f
PYB
Fn01=06Bd
NE
dlohserhTtupnIelbanEV
HI
6.1 V
V
LI
4.0
tnerruCsaiBtupnIelbanE
)3(
I
NE
V0 £ VNE£ V
NI
5.0- 0 5.0+ Aµ
noitcetorPerutarepmeTrevO
leveLpirThgiHT
IH
051C°
siseretsyHT
TSYH
02C°
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) Defined as the input to output differential at which the output voltage drops 100mV below the value measured
at a differential of 1V. Not measurable on 1.5V and 1.8V parts due to minimum VIN constraints.
(3) Guaranteed by design.
Electrical Characteristics (Cont.)
Page 4
4ã 2000 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1453
PRELIMINARY
Notes:
(1) Where -X.X denotes voltage options. Available
voltages are: 1.5V, 1.8V, 2.5V, 2.7V, 2.8V, 3.0V and 3.3V.
(2) Only available in tape and reel packaging. A reel
contains 3000 devices.
rebmuNtraPegakcaP
RTKSIX.X-3541CS
)2()1(
5-32-TOS
Top View
SOT-23-5L
#niPemaNniPnoitcnuFniP
1NI.niptupnI
2DNG.dedeenfigniknistaehrofdesuebnaC.nipdnuorG
3NE.desugniebtonfiNIottcennoC.nipelbanehgihevitcA
4PYB nipsihtneewteb)muminimFn1,lacipyt(roticapacFn01atcennoC.ssapybecnerefeR
.esiontuptuoecuderotDNGdna
5TUO.Am051otpugnicruos,tuptuorotalugeR
Pin Configuration Ordering Information
Pin Descriptions
Block Diagram
Page 5
5
ã 2000 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1453
PRELIMINARY
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
Outline Drawing - SOT-23-5
Land Pattern - SOT-23-5
Contact Information
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