1
www.semtech.com
EZ55Z3L
0.25 Amp Positive
Voltage Regulators
POWER MANAGEMENT
Revision 10/2000
Description
u
External capacitor not required for stability
u
Low dropout performance
u
Five fixed voltage options: 3.3V, 5V, 9V, 12V, 24V
u
Adjustable output down to 1.25V
u
Line regulation typically 0.015%
u
Load regulation typically 0.1%
u
TO-92 and SOT-223 packages
The EZ55Z3L voltage regulators are monolithic integrated
circuits designed for use in applications requiring a well
regulated positive output voltage with low input-to-
output differential voltage requirements.
Outstanding features include full power usage up to
250mA of load current, internal current limiting and
thermal shutdown. Safe area protection on the die is
also included, providing protection of the series pass
transistor under most operating conditions. TO-92 and
SOT-223 packages are available for cost effective
applications.
Fixed Voltage Regulator
Adjustable Voltage Regulator
Features
Typical Application Circuits
+
=
2
R
1
R
1
250
.
1
V
OUT
2
2001 Semtech Corp.
www.semtech.com
EZ55Z3L
POWER MANAGEMENT
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Note:
(1) Specifications are applicable for a power dissipation of 2.5W and are only achievable over a limited range of
V
IN
- V
OUT
.
Unless otherwise specified: (V
IN
- V
OUT
) = 1.45V to 10V and I
OUT
= 10mA to 250mA. Values in bold apply over the full operating temperature range.
Absolute Maximum Ratings
Electrical Characteristics
3
2001 Semtech Corp.
www.semtech.com
EZ55Z3L
POWER MANAGEMENT
r
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t
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m
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Notes:
(1) Specifications are applicable for a power dissipation of 2.5W and are only achievable over a limited range of
V
IN
- V
OUT
.
(2) Low duty cycle pulse testing with Kelvin connections required. Changes in output voltage due to heating effects
are covered under the specification for thermal regulation.
(3) 30ms pulse.
(4) Bandwidth of 10Hz to 10kHz
(5) 120Hz input ripple, 1 dB less for each volt increase above 3.3V Min.; C
OUT
& C
ADJ
(for ADJ) = 25F.
Unless otherwise specified: (V
IN
- V
OUT
) = 1.45V to 10V and I
OUT
= 10mA to 250mA. Values in bold apply over the full operating temperature range.
Electrical Characteristics (Cont.)
4
2001 Semtech Corp.
www.semtech.com
EZ55Z3L
POWER MANAGEMENT
Notes:
(1) Where X denotes voltage options. Available voltages
are: 3.3V, 5V, 9V, 12V and 24V. Replace X with ADJ for
adjustable version (1.25 to 24V).
(2) Only available in tape and reel packaging. A reel
contains 2500 devices.
(3) Available in tape and reel packaging (a reel contains
3000 devices) or ammo pack (suffix TA, an ammo pack
contains 2000 devices).
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3
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T
.
X
Z
-
L
3
Z
5
5
Z
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)
3
(
2
9
-
O
T
Pin Configurations
Ordering Information
N
I
P
N
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T
C
N
U
F
1
D
N
G
/
J
D
A
2
T
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3
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T
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b
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T
3
2
2
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T
O
S
Block Diagram
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