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SC4205IS-2.5TRT

P1-P3P4-P6P7-P8
1 www.semtech.com
SC4205
Very Low Dropout
1 Amp Regulator With Enable
POWER MANAGEMENT
Notes:
(1) Maximum VO setpoint for 1.8V parts = 5.4V.
(2) This device is designed to operate with ceramic input and output capacitors.
Revision: June 28, 2004
The SC4205 is a high performance positive voltage
regulator designed for use in applications requiring very
low dropout voltage at up to 1 Amp. Since it has
superior dropout characteristics compared to regular
LDOs, it can be used to supply 2.5V on motherboards or
2.8V on peripheral cards from the 3.3V supply thus
allowing the elimination of costly heatsinks. Additionally,
the SC4205 has an enable pin to further reduce power
dissipation while shut down. The SC4205 provides ex-
cellent regulation over variations in line, load and tem-
perature.
The SC4205 is available in the SOIC-8EDP package with
internally preset outputs that are also adjustable using
external resistors.
350mV dropout @ 1A
Adjustable output from 1.2V to 4.8V
2.5V and 1.8V options (adjustable externally
using resistors)
Over current and over temperature protection
Enable pin
10µA quiescent current in shutdown
Low reverse leakage (output to input)
Surface mount and through-hole packages
Full industrial temperature range
Available in SOIC-8EDP package
Battery powered systems
Motherboards
Peripheral cards
Network cards
Set Top Boxes
Medical Equipment
Notebook Computers
Description Features
Applications
VIN
C1
C2
U1
SC4205
4
3
2
81
5
6
7
NC
VIN
EN
GNDNC
NC
VO
ADJ
VO
ENABLE
VIN
C1
C2
U1
SC4205
4
3
2
81
5
6
7
NC
VIN
EN
GNDNC
NC
VO
ADJ
VO
ENABLE
Volts
R2
R2)(R11.2
VO
+
=
Typical Application Circuits
ENABLE
C1
R1
R2
VO
U1
SC4205
4
3
2
81
5
6
7
NC
VIN
EN
GNDNC
NC
VO
ADJ
C2
VIN
22004 Semtech Corp. www.semtech.com
SC4205
POWER MANAGEMENT
retemaraP lobmySxaMstinU
egatloVtupnI V
NI
7V
noitapissiDrewoP P
D
detimiLyllanretnIW
PDE8-CIOStneibmAotnoitcnuJecnatsiseRlamrehT
)1(
θ
AJ
63W/C°
PDE8-CIOSesaCotnoitcnuJecnatsiseRlamrehT
)1(
θ
CJ
5.5W/C°
egnaRerutarepmeTtneibmAgnitarepO T
A
58+ot04-C°
egnaRerutarepmeTnoitcnuJgnitarepO T
J
051+ot04-C°
egnaRerutarepmeTegarotS T
GTS
051+ot56-C°
.ceS01)gniredloS(erutarepmeTdaeL T
DAEL
003C°
)ledoMydoBnamuH(gnitaRDSE V
DSE
4Vk
Note: (1) 1 square inch of FR-4, double sided, 1 oz. minimum copper weight.
retemaraPlobmySsnoitidnoCtseTniMpyTxaMstinU
NIV
egnaRegatloVgnitarepOV
NI
2.25.5 V
tnerruCtnecseiuQI
Q
V
NI
V3.3=57.0 57.1 Am
V
NI
V,V5.5=
NE
V0=01 53 Aµ
OV
egatloVtuptuO
)1(
V
O
I
O
Am01=
%1-V
O
%1+V
)egatloVdexiFlanretnI(
%2-%2+
noitalugeReniL
)1(
GER
)ENIL(
I
TUO
Am01=530.0 3.0 %
noitalugeRdaoL
)1(
GER
)DAOL(
I
TUO
A1otAm01=2.0 4.0 %
egatloVtuoporD
)2()1(
V
D
I
O
Am01=5.201
Vm
02
I
O
Am005=09003
Vm
004
I
O
A1=081004
Vm
005
Absolute Maximum Ratings
Electrical Characteristics
Unless specified: V
EN
= V
IN
. Adjustable Option (V
ADJ
> V
TH(ADJ)
): V
IN
= 2.2V to 5.5V and I
O
= 10µA to 1A.
Fixed Options (V
ADJ
= GND): V
IN
= (V
O
+ 0.5V) to 5.5V and I
O
= 0A to 1A. Values in bold apply over T
J
= -40°C to 125°C
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.
32004 Semtech Corp. www.semtech.com
SC4205
POWER MANAGEMENT
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 to 1% below the value
measured at a differential of 0.7V.
(3) Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this
requirement. Adjustable versions only.
(4) Guaranteed by design.
(5) When V
ADJ
exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from
the error amplifier and connects V
ADJ
instead.
retemaraPlobmySsnoitidnoCtseTniMpyTxaMstinU
).tnoC(OV
tnerruCdaoLmuminiM
)3(
I
O
1 01 Aµ
timiLtnerruCI
LC
6.1 33.1 5.3 A
JDA
egatloVecnerefeR
)1(
V
FER
V
NI
V,V2.2=
JDA
V=
TUO
I,
O
Am01=881.1002.1212.1V
671.1422.1
tnerruCniPtsujdA
)4(
I
JDA
V
JDA
V=
FER
03 002 An
dlohserhTniPtsujdA
)5(
V
)JDA(HT
50.0 02.0 04.0 V
NE
tnerruCniPelbanEI
NE
V
NE
V,V0=
NI
V3.3=5.1 01 Aµ
dlohserhTniPelbanEV
HI
V
NI
V3.3= 6.1 V
V
LI
V
NI
V3.3= 4.0
noitcetorPerutarepmeTrevO
levelpirThgiHT
IH
071C°
siseretsyHT
TSYH
02C°
Electrical Characteristics (Cont.)
Unless specified: V
EN
= V
IN
. Adjustable Option (V
ADJ
> V
TH(ADJ)
): V
IN
= 2.2V to 5.5V and I
O
= 10µA to 1A.
Fixed Options (V
ADJ
= GND): V
IN
= (V
O
+ 0.5V) to 5.5V and I
O
= 0A to 1A. Values in bold apply over T
J
= -40°C to 125°C
P1-P3P4-P6P7-P8

SC4205IS-2.5TRT

Mfr. #:
Buy SC4205IS-2.5TRT
Manufacturer:
Semtech
Description:
LDO Voltage Regulators ULDO 1.5A 2.5V SO-8
Lifecycle:
New from this manufacturer.
Delivery:
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Payment:
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