ATC Analog Technology, AP1117 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Features General Description 1.4V maximum dropout at full load current * Fast transient response * Output current limiting * Built-in thermal shutdown * Packages: SOT223, TO252, TO220, SOT89 * Good noise rejection * 3-Terminal Adjustable or Fixed 1.5V, 1.8V,2.5V, 3.3V, 5.0V AP1117 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. AP1117 is also well suited for other applications such as VGA cards. AP1117 is guaranteed to have <1.3V dropout at full load current making it ideal to provide well regulated outputs of 1.25 to 5.0 with 6.3 to 12V input supply. * Applications * * PC peripheral Communication Ordering Information AP 1117 X XX X Package Low Dropout Regulator Vout E : SOT223-3L D : TO252-3L T : TO220-3L Y : SOT89-3L Packing Blank : ADJ Blank : Tube 15 : 1.5V A : Taping 18 : 1.8V 25 : 2.5V 33 : 3.3V 50 : 5.0V Typical Circuit 5V 5V C1 100uF C1 100uF Vin Vin Vout GND Vo Vout 3.3V/1A C2 100uF Adj Tab is Vout R1 121 R2 121 2.5V/1A C2 100uF Tab is Vout ( 5V/2.5V ADJ output ) ( 5V/3.3V fixed output ) Note: Vo = VREF (1+ R2 ) R1 This datasheet contains new product information. Analog Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. A4. Apr. 18, 2003 1/7 ATC AP1117 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Connection Diagram 3 PIN SOT223 3 PIN TO252 ( Top View ) ( Top View ) 3 Vin 2 Vout Vin 3 Vout 2 1 Adj (GND) 1 Tab is Vout Adj (GND) Tab is Vout 3 PIN SOT89 3 PIN TO220 Vin 3 Vin 2 Vout 2 Vout 1 Adj (GND) 1 Adj (GND) 3 Tab is Vout Tab is Vout Block Diagram 3 2 Vout + + - 1.25V CURRENT LIMIT + Thermal Shutdown + 1 - Vin GND (FIXED) 1 Rev. A4 2/8 Adj APR. 18, 2003 ATC AP1117 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Pin Descriptions NAME I/O PIN # FUNCTION Adj (GND) I 1 A resistor divider from this pin to the Vout pin and ground sets the output voltage. (Ground only for Fixed-Mode) Vout O 2 The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. 3 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 transient response. This pin must always be 1.3V higher than Vout in order for the device to regulate properly. Vin I Absolute Maximum Ratings DC Supply Voltage (Vin) ........................................................ -0.3 to 12 V Power Dissipation ......................................................... Internally Limited Storage Temperature .......................................................... -65 to +150 oC Operating Junction Temperature Range ........................................... 0 to +150 oC Rev. A4 3/8 APR. 18, 2003 ATC AP1117 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Electrical Characteristics (Under Operating Conditions) PARAMETER Reference Voltage CONDITIONS AP1117-ADJ AP1117-1.5 AP1117-1.8 Output Voltage AP1117-2.5 AP1117-3.3 AP1117-5.0 Line Regulation AP1117-XXX AP1117-ADJ AP1117-1.5 AP1117-1.8 Load Regulation AP1117-2.5 AP1117-3.3 AP1117-5.0 Dropout Voltage (VIN-VOUT) o TJ=25 C,(VIN-OUT)=1.5V IO=10mA o IOUT = 10mA, TJ = 25 C, 3VVIN12V o IOUT = 10mA, TJ = 25 C, 3.3VVIN12V o IOUT = 10mA, TJ = 25 C, 4VVIN12V o IOUT = 10mA, TJ = 25 C, 4.8VVIN12V o IOUT = 10mA, TJ = 25 C, 6.5VVIN12V IO=10mA,VOUT+1.5V