1 www.semtech.com
EZ1085BC, EZ1085C
& EZ1085I
3 Amp Positive Voltage Regulator
POWER MANAGEMENT
Revision 1, December 2000
The EZ1085 series of high performance positive voltage
regulators are designed for use in applications requiring
low dropout performance at up to 3A. Additionally, the
EZ1085 series provides excellent regulation over
variations in line, load and temperature.
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the
output device.
A variety of options are available for maximum flexibility:
the EZ1085C has both fixed and adjustable voltage
options and is designed for use in commercial
applications; the EZ1085BC is adjustable only for cost
sensitive commercial applications; the EZ1085I is
adjustable only for industrial applications.
All devices are available in the popular TO-220 and
TO-263 packages.
KLow dropout voltage: 1.3V max. for EZ1085C,
1.4V max. for EZ1085I, 1.45V max. for EZ1085BC
KFull current rating over line and temperature
KFast transient response
K±2% total output regulation over line, load and
temperature (±2.4% for EZ1085BC)
KAdjust pin current max 90µA over temperature
KFixed/adjustable output voltage (EZ1085C)
KLine regulation typically 0.015%
KLoad regulation typically 0.05%
KIndustrial temperature range (EZ1085I)
KTO-220 and TO-263 packages
KPrinter and plotter supplies
KInstrumentation
KMedical equipment
KMicrocontroller systems
KTelecommunication systems
KMotherboards
KSwitching supply post regulation
Description Features
Applications
Fixed Voltage Regulator
Adjustable Voltage Regulator
Typical Application Circuit
VIN > 4.75V VOUT = 3.45V
VOUT = 3.3V
VIN > 4.75V
U1 EZ1085
1
23
ADJ
OUTIN TAB
+
C2
10uF Tant. Min.
R1
133 Ohm, 1%
+
C1
10uF Tant.
U1 EZ1085C-3.3
1
23
GND
OUTIN TAB
R2
232 Ohm, 1%
+
C1
10uF Tant.
+
C2
10uF Tant. Min
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
2RI
1R2R
1VV ADJREFOUT •+
+•=
2 2000 Semtech Corp. www.semtech.com
EZ1085BC, EZ1085C
& EZ1085I
POWER MANAGEMENT
retemaraPlobmySmumixaMstinU
egatloVylppuStupnIV
NI
7V
noitapissiDrewoPP
D
detimiLyllanretnIW
esaCotnoitcnuJecnatsiseRlamrehT 022-OT 362-OT θ
CJ
3
3W/C°
tneibmAotnoitcnuJecnatsiseRlamrehT 022-OT 362-OT θ
AJ
0506 W/C°
egnaRerutarepmeTtneibmAgnitarepO C5801ZE,CB5801ZE I5801ZE T
A
07ot0 58ot04- C°
egnaRerutarepmeTnoitcnuJgnitarepO C5801ZE,CB5801ZE I5801ZE T
J
521ot0 521ot04- C°
egnaRerutarepmeTegarotST
GTS
051ot56-C°
.ceS01)gniredloS(erutarepmeTdaeLT
DAEL
003C°
)ledoMydoBnamuH(gnitaRDSEDSE2Vk
retemaraPlobmySV
NI
I
O
niMpyTxaMstinU
egatloVtuptuO
)1(
V
O
V5Am0Vl99.0
O
lV
O
Vl10.1
O
lV
X.X-C5801ZE Vl89.0
O
lVl20.1
O
l
egatloVecnerefeR
)1(
V
FER
V5Am01832.1052.1262.1V
I5801ZE,C5801ZE 522.1572.1
egatloVecnerefeR
)1(
V
ER
V5Am01332.1052.1762.1V
CB5801ZE 022.1082.1
noitalugeReniL
)1(
GER
)ENIL(
Am01540.0 2.0 %
noitalugeRdaoL
)1(
GER
)DAOL(
V551.0 4.0 %
egatloVtuoporD
)2()1(
X.X-C5801ZE,C5801ZEV
D
A302.1 03.1 V
I5801ZE 02.1 04.1
CB5801ZE 02.1 54.1
timiLtnerruCI
LC
0.3 5.4A
Unless otherwise specified: Adj. VIN = 2.75V to 7.0V and Adj. IO = 10mA to 3A; Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 3A.
Values in bold apply over full operating ambient temperature range.
Absolute Maximum Ratings
Electrical Characteristics
3 2000 Semtech Corp. www.semtech.com
EZ1085BC, EZ1085C
& EZ1085I
POWER MANAGEMENT
retemaraPlobmySV
NI
I
O
niMpyTxaMstinU
tnerruCtnecseiuQ noisreVegatloVdexiF I
Q
V50141 Am
tneiciffeoCerutarepmeTT
C
500.0C°/%
tnerruCniPtsujdAI
JDA
55 09 Aµ
egnahCtnerruCniPtsujdA ∆I
JDA
2.0 5Aµ
ytilibatSerutarepmeTT
S
V5A5.0 5.0 %
tnerruCdaoLmuminiM snoisreVegatloVjdA I
O
V5501 Am
esioNtuptuOSMR
)3(
V
N
300.0V%
O
oitaRnoitcejeRelppiR
)4(
R
A
V5A306 27Bd
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) ∆VOUT, ∆VREF = 1%
(3) Bandwidth of 10 Hz to 10 kHz.
(4) 120 Hz input ripple (CADJ for ADJ = 25µF).
Electrical Characteristics (Cont)
Unless otherwise specified: Adj. VIN = 2.75V to 7.0V and Adj. IO = 10mA to 3A; Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 3A.
Values in bold apply over full operating ambient temperature range.
4 2000 Semtech Corp. www.semtech.com
EZ1085BC, EZ1085C
& EZ1085I
POWER MANAGEMENT
eciveD
)2()1(
egakcaP
RT.MCB5801ZE RT.X.X-MC5801ZE RT.MI5801ZE 362-OT
)3(
TCB5801ZE X.X-TC5801ZE TI5801ZE 022-OT
)4(
Notes:
(1) Where X.X denotes voltage options (EZ1085C only).
Available voltages are: 2.5V, 3.3V and 3.45V. Leave blank
for adjustable version (1.3 to 5.7V). Contact factory for
additional voltage options.
(2) Where C and I denote Commercial (0°C to 70°C)
and Industrial (-40°C to 85°C) ambient temperature
ranges.
(3) Only available in tape and reel packaging. A reel
contains 800 devices.
(4) Only available in tube packaging. A tube contains 50
devices.
niPemaNniPnoitcnuFniP
1TSUJDA
DNUORG
esnopsertneisnarT.secivedelbatsujdarofegatlovecnereferehtfoedisevitagenehtsinipsihT .dnuorgotniptsujdaehtmorfroticapacssapybllamsagniddaybdevorpmiebnac
dna,strapegatlovtuptuodexifrofniahckcabdeefrotsiserlanretniehtfodnemottobehtsinipsihT .dnuorgotdetcennocebdluohs
2TUPTUO .BATehtotdetcennocyllacirtcelesidnaecivedehtfotuptuorewopehtsisihT
3TUPNI .ecivedssapehtdnayrtiucriclortnocehthtobrofnipylppustupniehtsisihT
Pin Configurations Ordering Information
Pin Descriptions
Block Diagram
5 2000 Semtech Corp. www.semtech.com
EZ1085BC, EZ1085C
& EZ1085I
POWER MANAGEMENT
Outline Drawing - TO-220
Outline Drawing - T0-263
6 2000 Semtech Corp. www.semtech.com
EZ1085BC, EZ1085C
& EZ1085I
POWER MANAGEMENT
Land Pattern - TO-263
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
Contact Information
