Advanced Power Electronics Corp, AP1250GM / AP1250GH 1.5A / 3A Bus Termination Regulator Pb Free Plating Product General Description AP1250GM/H 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/3A 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 and TO-252-5L packages are available for all commercial and industrial surface mount applications. Features ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ Ideal for DDR-I and DDR-II applications Capable of sourcing and sinking current 1.5A/3A Current limiting protection Thermal protection Current-shoot-through protection High accuracy output voltage at full load Minimum external components Adjustable V OUT by external resistors Shutdown for standby or suspend mode operation with high-impedance output Block Diagram VCNTL VREFEN VIN Current limiting sensor CNTL VOUT Thermal GND Data and specifications subject to change without notice 200807035,1/5 AP1250GM / AP1250GH Applications ▼ ▼ ▼ ▼ ▼ ▼ ▼ Mother Board DDR-SDRAM Termination Mother Board DDR-II Termination Game / Play Station Set Top Box PCI / AGP Graphics IPC SCSI-III Bus Termination Pin Configuration ● Part No. AP1250GM (SO-8 package) VIN ● Part No. AP1250GH (TO-252-5L package) VCNTL GND VCNTL VREFEN VCNTL VOUT VCNTL 1. VIN 2. GND 3. VCNTL(TAB) 4. VREFEN 5. VOUT 1 2 3 4 5 Pin Description Pin Name Function VIN Power Input GND Ground VCNTL Gate Drive Voltage VREFEN Reference Voltage Input and Chip Enable VOUT Output Voltage Data and specifications subject to change without notice 2/5 AP1250GM / AP1250GH Absolute Maximum Ratings Power 6V internal limited HBM 3KV -55 ℃ to 150 ℃ 260 ℃ ! WKMF 20℃/W ! WKMD 80℃/W ""! WKMF 6℃/W ""! WKMD 40℃/W Electrical Characteristics @ T A = 25℃ ℃ ( unless otherwise specified ) VIN = +2.5V, V CNTL = +3.3V, V REFEN = +1.25V, COUT = 10uF(Ceramic) Symbol Parameter VOS Output Offset Voltage | △ VLOAD | Load Regulation VIN 1 2 Input Voltage Range(DDR I/II) VCNTL Gate Drive Voltage Range ISHDN Current in Shutdown 2 Max. Units Test Conditions Min. Typ. IOUT = 0A -20 -5 20 mV IL : 0 --> 1.5A -- 0.5 2 % IL : 0 --> - 1.5A -- 0.5 2 % VCNTL >= V IN 1.6 2.5/1.8 -- V VCNTL >= V IN -- 3.3 6 V VREFEN < 0.2V,RL=180Ω -- 10 90 uA AP1250M -- 2 -- A AP1250H -- 3 -- A IOUT = 0A -- 1 3 mA 3.3V≦VCNTL≦ 5V -- 140 -- ℃ Short Circuit Protection ILIMIT Iq Current Limit Quiescent Current Over Temperature Protection T OS Thermal Shutdown Temperature Shutdown Function Shutdown Threshold Trigger Output = High 0.8 -- -- V Shutdown Threshold Trigger Output = Low -- -- 0.2 V Notes: 1.VOS is the voltage measurement V OUT subtracted from VREFEN. 2.Keep VCNTL >= V IN at power on/off sequences. 3.Surface mounted on 1 in2 copper pad of FR4 board Data and specifications subject to change without notice 3/5 AP1250GM / AP1250GH Typical Performance Characteristics 1.275 1.25 1.25 VOUT (V) VOUT (V) 1.275 1.225 1.225 VIN = 1.25V TA = 25℃ VCNTL = 3.3V TA = 25℃ 1.2 1.5 1.7 1.2 1.9 VIN(V) 2.1 2.3 2.5 2.5 Fig 1. Line Regulation( VIN vs. VOUT ) 4 4.5 VCNTL (V) 5 5.5 6 Sink VIN = 2.5V VCNTL = 3.3V VREFEN = 1.25V IL(2.0A/DIV) IL(2.0A/DIV) 3.5 Fig 2. Line Regulation( VCNTL vs. VOUT ) VIN = 2.5V VCNTL = 3.3V VREFEN = 1.25V Source 3 Time(200us/DIV) Time(200us/DIV) Fig 3. Output Short-Circuit Protection Data and specifications subject to change without notice Fig 4. Output Short-Circuit Protection 4/5 AP1250GM / AP1250GH Typical Performance Characteristics VIN = 2.5V VCNTL = 3.3V IL=-1.5A f=1KHz Sink IL(0.5A/DIV) IL(0.5A/DIV) VOUT(100mV/DIV) Source VOUT(100mV/DIV) VIN = 2.5V VCNTL = 3.3V IL=1.5A f=1KHz Time(200us/DIV) Time(200us/DIV) Fig 5. Transient Response Fig 6. Transient Response VIN = 2.5V VCNTL = 3.3V f=1KHz 100 90 80 Tc = 80℃ 100℃ 120℃ Duty (%) 70 60 50 40 30 20 10 0 2 4 IL (A)6 8 10 Fig 7. Safe Operating Area Data and specifications subject to change without notice 5/5