AP1117/AP1117I 1A DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR Description Pin Assignments AP1117 is a low dropout positive adjustable or fixed-mode regulator SOT89-3 with 1A output current capability. The product is voltage specifically ( Top View ) designed to provide well-regulated supply for low IC applications such as high-speed bus termination and low current 3.3V logic supply. 3 VIN AP1117 is also well suited for other applications such as VGA cards. 2 VOUT AP1117 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25 to 5.0 1 Adj (GND) with 6.4V to 18V input supply. AP1117 is available both in commercial Tab is VOUT temperature grade (AP1117) and in industrial temperature range (AP1117I) (TO252 and SOT223). SOT223 ( Top View ) Features 3 VIN 1.4V Maximum Dropout at Full Load Current 2 VOUT Fast Transient Response Output Current Limiting 1 Adj (GND) Built-in Thermal Shutdown Tab is VOUT Good Noise Rejection 3-Terminal Adjustable or Fixed 1.5V, 1.8V,2.5V, 3.3V, 5.0V TO220-3 Operating Junction Temperature range 0C T +125C (All packages) ( Front View ) J -20C T +125C (see ordering information) J 3 VIN -40C T +125C (see ordering information) J 2 VOUT Lead-Free Packages: SOT223, TO252, SOT89-3, TO263 and 1 Adj (GND) TO220-3 Tab is VOUT Totally Lead-Free RoHS Compliant (Notes 1 & 2) TO252 and TO263 SOT223, TO252, SOT89-3, TO263 and TO220-3: Available in Green Molding Compound (No Br, Sb) ( Top View ) Halogen and Antimony Free. Green Device (Note 3) VIN 3 2 VOUT Applications 1 Adj (GND) PC Peripheral Tab is VOUT Communication Consumer Equipment Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP1117/AP1117I Typical Applications Circuit ( 5V/3.3V fixed output ) ( 5V/2.5V ADJ output ) R 2 V V (1 ) o REF R 1 Pin Descriptions Pin Number I/O Pin Name Function A resistor divider from this pin to the V pin and ground sets the output voltage (Ground only for OUT 1 I Adj (GND) Fixed-Mode). The output of the regulator. A minimum of 4.7F capacitor (0.15 ESR 0.5 ) must be connected 2 O V OUT from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load 3 I V transient response. This pin must always be 1.3V higher than V in order for the device to regulate IN OUT properly. A minimum of 4.7F capacitor (0.15 ESR 0.5 ) must be connected from this pin to ground to insure stability. Functional Block Diagram 3 2 V V IN OUT + + + 1.25V CURRENT 1 LIMIT GND + (FIXED) Thermal Adj Shutdown 1 2 of 13 June 2013 AP1117/AP1117I Diodes Incorporated www.diodes.com Document number: DS31009 Rev. 23 - 2 - -