A Product Line of
Diodes Incorporated
ZLDO1117
1A LOW DROPOUT POSITIVE REGULATOR
1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V AND ADJUSTABLE OUTPUTS
Description Pin Assignments
ZLDO1117 is a low dropout positive adjustable or fixed-mode
SOT223
regulator with 1A output current capability.
The ZLDO1117 has a 2% tolerance across the industrial temperature
range and is guaranteed to have lower than 1.2V dropout at full load
current making it ideal to provide well-regulated outputs of 1.2V to
5.0V with input supply voltages up to 18V.
The ZLDO1117 is ideally suited to provide well-regulated supplies for
low voltage IC applications such as high-speed bus termination and
low current 3.3V logic supply across the whole industrial temperature
range.
TO252
(Top View)
Features
Vin
3
1.2V Maximum Dropout at Full Load Current
2 Vout
2% Tolerance Over Temperature, Line and Load Variations
1 Adj (GND)
Fast Transient Response
Tab is Vout
Output Current Limiting
Built-in Thermal Shutdown
Good Noise Rejection
Suitable for use with MLCC Capacitors
Qualified to AEC-Q100 Grade 2 (see Ordering Information)
PPAP capable (Note 4)
-40 to +125C Junction Temperature Range
Available in TO252 and SOT223 with Green Molding Compound
(No Br, Sb)
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See
A Product Line of
Diodes Incorporated
ZLDO1117
Pin Descriptions
Pin
Pin
I/O Function
Number
Name
A resistor divider from this pin to the V pin and ground sets the output voltage (Ground only for
OUT
Adj (GND) I 1
Fixed-Mode).
The output of the regulator. A minimum of 4.7F capacitor (0.05 ESR 0.5 ) must be connected
V O 2
OUT from this pin to ground to insure stability. For improved ac load response a larger output capacitor is
recommended.
The input pin of regulator. Typically a large storage capacitor (0.05 ESR 0.5 ) is connected from
this pin to ground to ensure that the input voltage does not sag below the minimum dropout voltage
V I 3
IN
during the load transient response. This pin must always be 1.3V higher than V in order for the
OUT
device to regulate properly.
Absolute Maximum Ratings (@T = +25C, unless otherwise specified.)
A
Symbol Parameter Rating Unit
V Input Supply Voltage (Relative to Ground) -0.03 to +18 V
IN
T Junction Temperature +150 C
J
Power Dissipation See SOA Curve
T Storage Temperature -65 to +150 C
ST
Unless otherwise stated voltages specified are relative to the ANODE pin.
1.2
1
0.8
0.6
SOA
0.4
0.2
0
0 5 10 15 20 25
V - V (V)
IN OUT
Safe Operation Area (SOA) Curve
ESD Susceptibility
Symbol Parameter Rating Unit
HBM Human Body Model 4 kV
MM Machine Model 400 V
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional
operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to
absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and
transporting these devices
2 of 14 July 2012
ZLDO1117
Diodes Incorporated
www.diodes.com
Document number: DS32018 Rev. 6 - 2
I (A)
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