EZ1117/EZ1117A
POWER MANAGEMENT
Description
The EZ1117 series of high performance positive voltage
regulators are designed for use in applications requiring
low dropout performance at full rated current.
Additionally, the EZ1117 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. The EZ1117 series of three terminal regulators
offer
fi
xed and adjustable voltage options available in
the space saving SOT-223 and TO-263 packages.
0.8 & 1.0 AMP Positive
Voltage Regulators
Features
Low dropout performance,
1.2V max. for EZ1117
1.3V max. for EZ1117A
Full current rating over line and temperature
Fast transient Response
±2% total output regulation over line, load and
temperature
Adjust pin current max 90μA over temperature
Fixed/adjustable output voltage
Line regulation 0.2% max.
Load regulation 0.4% max.
SOT-223 and TO-263 packages
Typical
Application Circuits
Adjustable Voltage Regulator
(1)(2)
Ξ
V
OUT
=
≥
4.75V
2/TAB
3
3.45V
V
OUT
Applications
Active SCSI termination
Low voltage microcontrollers
Switching power supply post-regulator
EZ1117
1
I
ADJ
V
REF
R1
133
1%
R2
232
1%
+
C1
10μF
+
C2
10μF
TANT
Ordering
Information
Device
(1,2)
EZ1117CST-X.X
EZ1117ACST-X.X
EZ1117CM-X.X
EZ1117ACM-X.X
Package
SOT-223
TO-263
V
OUT
Volts
See Note (1)
See Note (1)
V
OUT
= V
REF
(
1 + R2
)
+ I
ADJ
R
2
R1
(1) C1 Needed if device is far from filter capacitors
(2) C2 Required for Stability
Fixed Voltage Regulator
(1)(2)
≥
V
OUT
=
η∂4.75V
2/TAB
3
EZ1117-3.3
1
I
Q
+
C2
10μF
TANT
3.3V
V
OU
Notes:
(1) Where X.X denotes voltage options. Available voltages are:
2.5V, 2.85V and 3.3V. Leave blank for adjustable version (1.3 to
5.7V). Contact factory for additional voltage options.
(2) Add suffix ‘TR’ for tape and reel.
+
C1
10μF
(1) C1 Needed if device is far from filter capacitors
(2) C2 Required for Stability
Active SCSI Bus Terminator
OUT
IN
EZ1117
GND
+
22μF
+
10μF
18 to 27
Lines
May 23, 2006
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EZ1117/EZ1117A
Absolute
Maximum Ratings
Parameter
Input Supply Voltage
Power Dissipation
Thermal Resistance Junction to Case SOT-223
TO-263
Thermal Resistance Junction to Ambient SOT-223
TO-263
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec
Symbol
V
IN
P
D
θ
JC
Max
7
Internally Limited
15
3
156
60
0 to 125
-65 to 150
260
Units
V
W
°C/W
θ
JA
T
J
T
STG
T
LEAD
°C/W
°C
°C
°C
Electrical
Characteristics
(6)
Adj. Option: V
IN
= 2.65V to 7.0V and Adj I
O
= 10mA to I
RATED
Fixed Options: I
O
= 0mA to I
RATED
Fixed 2.5V: V
IN
= 3.9V to 7.0V
Fixed 2.85V: V
IN
= 4.25V to 7.0V
Fixed 3.3V: V
IN
= 4.75V to 7.0V
Test Conditions
Parameter
Output Voltage
(1)
(Fixed Voltage Versions)
Reference Voltage
(1)
(Adj Voltage Version)
Line Regulation
(1)
Load Regulation
(1)
V
REF
REG
(LINE)
REG
(LOAD)
5V
100mA
Dropout Voltage
(2)
V
D
EZ1117A
Current Limit
EZ1117
EZ1117A
I
CL
O.T.
0.8
1.0
500mA
O.T.
800mA
1,000mA
10mA
5V
10mA
Symbol
V
D
V
IN
5V
I
O
0mA
T
J(5)
25°C
O.T.
25°C
O.T.
O.T.
O.T.
Min
0.99|V
O
l
0.98|V
O
l
1.238
1.225
Test Limits
Typ
V
O
V
O
1.250
1.250
0.035
0.2
1.00
1.05
1.10
1.10
Max
1.01|V
O
l
1.02|V
O
l
1.262
V
1.270
0.2
0.4
1.10
1.15
V
1.20
1.30
%
%
Units
V
A
©
2006 Semtech Corp.
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EZ1117/EZ1117A
Electrical
Characteristics (Cont.)
Test Conditions
Parameter
Quiescent Current
Fixed Voltage Version
Temperature Coefficient
Adjust Pin Current
Adjust Pin Current Change
Temperature Stability
Minimum Load Current
Adj Voltage Version
RMS Output Noise
(3)
Ripple Rejection Ratio
(4)
NOTES:
(1)
(2)
(3)
(4)
(5)
(6)
Low duty cycle pulse testing with Kelvin connections required.
∆V
OUT
,
∆
V
REF
= 1%.
Bandwidth of 10Hz to 10kHz.
120Hz input ripple (CADJ for ADJ = 25μF).
O.T. = over specified operating junction temperature range.
I
RATED
= 1A for EZ1117A and 800mA for EZ1117.
Test Limits
T
J(5)
O.T.
O.T.
O.T.
O.T.
O.T.
Min
Typ
10
0.005
55
0.2
0.5
5
0.003
60
72
10
90
5
Max
13
Units
mA
%/°C
μA
μA
%
mA
%V
O
dB
Symbol
I
Q
T
C
I
ADJ
∆I
ADJ
T
S
I
O
V
N
R
A
V
IN
5V
I
O
5V
O.T.
25°C
5V
O.T.
Pin
Confi
gurations
Block
Diagram
Input
EZ1117
EZ1117A
PIN
1
2
3
SOT-223
TO-263
FUNCTION
ADJ/GND
OUTPUT
INPUT
Thermal Overload
Current
Limiting
Amplifier
S.O.A
Limit
Output
Sense
TAB IS OUTPUT
Voltage
Regulation
Amplifier
VREF
ADJ/COM
©
2006 Semtech Corp.
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EZ1117/EZ1117A
Outline
Drawing - SOT-223
Land
Pattern - SOT-223
©
2006 Semtech Corp.
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EZ1117/EZ1117A
Outline
Drawing - TO-263
Land
Pattern - TO-263
©
2006 Semtech Corp.
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嵌入式系统
