AP1186K518

AP1186 1.5A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator Feature • • • • • • • General Description AP1186 is a 1.5A regulator with extremely low dropout voltage. This product is specifically designed to provide well regulated supply for applications requiring 2.8V or lower voltages from 3.3V ATX power supplies where high efficiency of a switcher can be achieved without the cost and complexity associated with switching regulator. One such application is the new graphic chip sets that require anywhere from 2.4V to 2.7V supply. Adjustable or Fixed output voltage 1.5V, 1.8V, 2.5V, 3.3V, 5.0V 0.5V Maximum Dropout voltage at 1.5A Load current Built-in Thermal Shutdown Output Current Limiting Fast transient response Good noise rejection Package : TO220-5L, TO263-5L Ordering Information AP 1186 X X X X Low Dropout Regulator Package Vout Lead Free Blank : Normal L : Lead Free Package Packing Blank : Tube A : Taping& Reel K5:TO-263-5L Blank : Adj T5:TO-220-5L 15 : 1.5V 18 : 1.8V 25 : 2.5V 33 : 3.3V 50 : 5.0V Typical Application 3V + 470uF + Vin Vctrl Vout GND Vsense 5 4 3 2 1 5V 470uF 2.5V/1.5A + 470uF This datasheet contains new product information. Anachip Corp. 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.1.1 Sep.7, 2004 1/8 AP1186 1.5A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator Block Diagram Vin Vctrl + + CURRENT LIMIT THERMAL SHUTDOWN 1.25V + Adj + Vout Vsense Package Connect Diagram 5 PIN TO263 FRONT VIEW 5 4 3 2 1 Tab is Vout Vin Vctrl Vout Adj(GND) Vsense 5 PIN TO220 FRONT VIEW 5 4 3 2 1 Tab is Vout Vin Vctrl Vout Adj(GND) Vsense Pin Descriptions Name Adj (GND) Vsense I/O Description A resistor divider from this pin to the Vout pin and ground sets the output voltage. (GND only for fixed mode) This pin is the positive side of the reference that allows remote load sensing to achieve excellent load regulation. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. The input of the 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 higher than Vout in order for the device to regulate. This pin is the supply pin for the internal control circuit as well as the base drive for the pass transistor. This pin must always by higher than the Vout pin in order the device to regulate. A minimum of 100uF capacitor must be connected from this pin to ground to insure stability. Not used. The output of the regulator. A minimum of 100uF capacitor must be connected from this pin to ground to insure stability. I Vin I Vctrl NC Vout I O Anachip Corp. www.anachip.com.tw 2/8 Rev.1.1 Sep.7, 2004 AP1186 1.5A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator Absolute Maximum Ratings Symbol Vin Vctrl PD TST TOP Parameter Input Voltage Control Input Voltage Power Dissipation Storage Temperature Operating Junction Temperature Range Rating 16 18 Internally Limited -65 to +150 0 to +150 Unit V V oC oC Electrical Characteristics Unless otherwise specified, these specifications apply over, Cin=1uF, Cout=10uF, and Tj=0 to 150 C. Typical value refer to Tj=25 C. Vout = Vsense. o o SYM. VREF Vout Test Condition TJ=25oC,(VIN-VOUT)=0.5V,IO=10mA Reference Voltage AP1186-Adj Vctrl=VIN+1V IOUT = 10mA, TJ = 25oC, 2V≦VIN≦12V AP1186-1.5 Vctrl=VIN+1V IOUT = 10mA, TJ = 25oC, 2.3V≦VIN≦12V AP1186-1.8 Vctrl=VIN+1V IOUT = 10mA, TJ = 25oC, 3V≦VIN≦12V Output Voltage AP1186-2.5 Vctrl=VIN+1V IOUT = 10mA, TJ = 25oC, 3.8V≦VIN≦12V AP1186-3.3 Vctrl=VIN+1V IOUT = 10mA, TJ = 25oC, 5.5V≦VIN≦12V AP1186-5.0 Vctrl=VIN+1V IO=10mA, VOUT+0.5V