AP1084T25A

AP1084 5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Features 1.4V maximum dropout at full load current Built-in thermal shutdown • Output current limiting • Adjustable output voltage or fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V • Fast transient response • Good noise rejection • Package : TO252, TO263, TO220 • • General Description AP1084 is a low dropout positive adjustable or fixedmode regulator with minimum of 5.0A 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. AP1084 is also well suited for other applications such as VGA cards. AP1084 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 3.3V with 4.7 to 12V input supply. Ordering Information AP1084 X X X X Low Dropout Regulator Package D : TO252-3L K : TO263-3L T : TO220-3L Vout Blank : Adj 15 = 1.5V 18 = 1.8V 25 = 2.5V 33 = 3.3V 50 = 5.0V Lead Free Packing Blank : Normal Blank : Tube L : Lead Free Package A : Taping Typical Circuit 5.0V to 3.3V Fixed Mode Regulator 5V 5V C1 100uF Vin Vout GND Tab is Vout 3.3V/5A C2 100uF Vin Vout Adj Tab is Vout R1 121Ω R2 121Ω C2 100uF 2.5V/5A Adjustable Regulator C1 100uF Note: Vo = VREF ∗ (1+ R2 ) R1 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.1.0 Aug.27, 2004 1/10 AP1084 5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Block Diagram Vin 3 2 Vout + + － 1.25V CURRENT LIMIT + Thermal Shutdown 1 Adj － + Connection Diagram TO263 FRONT VIEW TO252 FRONT VIEW 3 2 1 Tab is Vout Vin Vout Adj (GND) Tab is Vout TO220 FRONT VIEW 3 2 Vout Adj (GND) 1 Vin Vout Adj (GND) 3 2 1 Vin Tab is Vout Pin Descriptions NAME Adj (GND) I/O PIN # 1 FUNCTION Adjustable (Ground only for fixed mode) The output of the regulator. A minimum of 10uF capacitor must be connected 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 transient response. This pin must always be 1.4V higher than Vout in order for the device to regulate properly. Vout O 2 Vin I 3 Anachip Corp. www.anachip.com.tw Rev.1.0 Aug.27, 2004 2/8 AP1084 5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Absolute Maximum Ratings Symbol Vin PD TST TOP Parameter DC Supply Voltage Power Dissipation Storage Temperature Operating Junction Temperature Range Rating Unit -0.3 to 12 V Internally Limited oC -65 to +150 oC 0 to +150 Electrical Characteristics PARAMETER Reference Voltage AP1084-XXX AP1084-1.5 AP1084-1.8 Line Regulation AP1084-2.5 AP1084-3.3 AP1084-5.0 AP1084-Adj AP1084-1.5 Load Regulation AP1084-1.8 AP1084-2.5 AP1084-3.3 AP1084-5.0 Dropout Voltage Current Limit Minimum Load Current Temperature Stability Thermal Resistance Junction-to-Ambient (No heat sink ;No air flow) Thermal Resistance Junction-to-Case SYM. VREF (Under Operating Conditions) MIN 1.225 1.470 1.764 2.450 3.235 4.900 TYP 1.250 1.500 1.800 2.500 3.300 5.000 MAX 1.275 0.2 1.530 1.836 2.550 3.365 5.100 1 12 15 20 26 40 1.3 5.1 5 10 15 18 25 33 50 1.4 UNIT V % V V V V V % mV mV mV mV mV V A mA % O ∆Vo CONDITIONS (Notes) Io=10mA, Tj=25oC, (Vin-Vout)=1.5V o IO=10mA, VOUT+1.5V