Advanced Power Electronics Corp. AP1250GM 1.5A BUS TERMINATION REGULATOR FEATURES DESCRIPTIOON Ideal for DDR-I and DDR-II Applications Capable of Sourcing and Sinking Current 1.5A Current Limiting Protection Thermal Protection Current-shoot-through Protection High Accuracy Output Voltage at Full Load Minimum External Components Adjustable VOUT by External Resistors Shutdown for Standby or Suspend Mode Operation with High-impedance Output AP1250GM is a linear regulator designed as a cost-effective solution for active termination of DDR SDRAM. The converting voltage range is from 1.6V to 6V into a desired output voltage, which is adjusted by two external resistors. The current sourcing and sinking capability of the regulator is up to 1.5A while the output voltage within 2%/3%. This device provides on-chip thermal shutdown and current limit functions for circuit tolerance of the output fault conditions. SO-8 packages are available for all commercial and industrial surface mount applications. Halogen Free Product APPLICATION Mother Board DDR-SDRAM Termination Mother Board DDR-II Termination Game / Play Station Set Top Box PCI / AGP Graphics IPC SCSI-III Bus Termination TYPICAL APPLICATION VCNTL=3.3V VIN=2.5V/1.8V/1.5V CIN VIN R1 RTT AP1250GM REFEN VOUT 2N7002 EN CCNTL VCNTL CSS R2 GND COUT VOUT = VREF = VIN x [ R2 / (R1+R2)] R1 = R2 = 100KΩ, RTT = 50Ω / 33Ω / 25Ω COUT,min = 10uF (Ceramic) + 1000uF under the worst case testing condition CSS = 1µF, CIN = 470µF(Low ESR), CCNTL = 47µF Data and specifications subject to change without notice 1 20130710V8.2 Advanced Power Electronics Corp. AP1250GM ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) ------------------------------------------ 6V HBM ESD Rating ------------------------------------------- 3KV Power Dissipation (PD) ------------------------------------ 1.25W Storage Temperature Range (T ST) --------------------- -65 to +150°C Junction Temperature Range (T J) --------------------- -40 to +125°C Ambient Temperature Range (T A) --------------------- -40 to +85°C Lead Temperature (Soldering, 10sec.) --------------- 260°C Note1 20°C/W Thermal Resistance from Junction to Ambient (R thja) 80°C/W Thermal Resistance from Junction to Case (Rthjc) Note1. Surface mounted on 1 in 2 copper pad of FR4 board ORDERING / PACKAGE INFORMATION (Top View) AP1250GX VIN 1 8 VCNTL GND 2 7 VCNTL Package Type VREF 3 6 VCNTL M : SO-8 VOUT 4 5 VCNTL SO-8 ELECTRICAL SPECIFICATIONS (VIN=2.5V, VCNTL=3.3V, VREFEN=1.25V, COUT=10uF(Ceramic), T A =25oC, unless otherwise specified) Parameter SYM TEST CONDITION MIN TYP MAX UNITS Input Input Voltage Range(DDR I/II)Note3 Gate Drive Voltage Range Note3 Current in Shutdown VIN VCNTL > VIN 1.6 2.5/1.8 - V VCNTL VCNTL > VIN - 3.3 6 V ISHDN VREFEN < 0.2V, RLOAD = 180Ω - 10 90 uA mV Output (DDR-I / DDR-II) Output Offset VoltageNote2 Load RegulationNote4 -20 -5 20 IOUT = 10mA ~ 1.5A - 0.5 2 IOUT = -10mA ~ -1.5A - 0.5 2 - 2 - A IOUT=0A - 1 3 mA TSD 3.3V < VCNTL < 5V - 140 - VIH Enable 0.8 - - VIL Shutdown - - 0.2 VOS ΔVLoad IOUT = 0A % Protection Current Limit ILIM Quiescent Current IQ Thermal Shutdown Temperature o C REFEN Shutdown Shutdown Threshold V Note2. VOS offset is the voltage measurement defined as V OUT subtracted from VREFEN. Note3. Keep VCNTL > VIN at power on/off sequences. Note4. Regulation is measured at constant junction temperature by using a 5ms current pulse. Devices are tested for load regulation in the load range from 0A to 1.5A. 2 Advanced Power Electronics Corp. AP1250GM PIN DESCRIPTIONS PIN SYMBOL VIN PIN DESCRIPTION Power Input Voltage. GND VOUT Ground Pin VCNTL Gate Drive Voltage VREFEN Output Voltage Reference Voltage Input and Chip Enable BLOCK DIAGRAM 3 Advanced Power Electronics Corp. AP1250GM TYPICAL PERFORMANCE CHARACTERISTICS Line Regulation( VIN vs. VOUT ) Line Regulation( VCNTL vs. VOUT ) Output Short-Circuit Protection (Source) Output Short-Circuit Protection (Sink) VIN=2.5V,VCNTL=3.3V,VREFN=1.25V VIN=2.5V,VCNTL=3.3V,VREFEN=1.25V Transient Response (Source) Transient Response (Sink) VIN=2.5V,VCNTL=3.3V,IOUT=0.1~1.5A VIN=2.5V,VCNTL=3.3V,IOUT=0.1~1.5A 4 Advanced Power Electronics Corp. AP1250GM TYPICAL PERFORMANCE CHARACTERISTICS Safe Operating Area 5 Advanced Power Electronics Corp. AP1250GM MARKING INFORMATION SO-8 Part Number Package Code 1250GM YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence 6