SP6659 Exar Corporation, SP6659 Datasheet
SP6659
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SP6659 Summary of contents
Page 1
... Offered in Low Profile TSOT-23 package The SP6659 is a 600mA synchronous buck regulator using a constant frequency, current mode architecture. The output voltage can be programmed using an external resistor divider. The 2.5V to 5.5V input voltage range is ideal for portable applications that use a Li-Ion battery. Switching frequency is internally set at 1 ...
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... 220°C DESCRIPTION Feedback Input Pin. Connect FB to the center point of the FB, Output Voltage Feedback Pin. An internal resistive OUT, SP6659 1.5MHz, 600mA Synchronous Buck Regulator 2 THERMAL RESISTANCE CONDITIONS V = 0.5V RUN VIN = 3.6V, VRUN = 0. +25ºC A 0º ...
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... CH 3: Inductor Current, 500mA/ div CH 4: Load Current, 500mA/ div Figure 6: Startup from Shutdown CH 1: RUN pin 2V/div Vout 1V/div CH 3: Inductor Current, 500mA/ div SP6659 1.5MHz, 600mA Synchronous Buck Regulator 3 = +27°C 20μS/div 20μS/div 40μS/div © 2006 Sipex Corporation ...
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... Figure 10: Output Voltage vs. Load Current Oscillator Frequency vs Supply Voltage 1.6 1.5 1.4 1.3 Vo=1.8V Iload=0A 1 Figure 12: Oscillator Frequency vs. Supply Voltage SP6659 1.5MHz, 600mA Synchronous Buck Regulator 4 = +27°C AMB 1.8Vout Load Regulation Vin=4.2V Vin=3.3V Vin=2.7V 100 200 300 400 500 600 Output Current (mA) Output Voltage vs Load Current Vin=3 ...
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... Figure 16: Load Regulation Vout =1.5V 1.230 1.220 1.210 Vin=2.7V 1.200 Vin=3.3V Vin=4.2V 1.190 0 100 1000 Figure 18: Load Regulation Vout =1.2V SP6659 1.5MHz, 600mA Synchronous Buck Regulator 5 = +27°C 2.5Vout Load Regulation Vin=4.2V Vin=3.3V Vin=2.7V 100 200 300 400 500 600 Output Current (mA) 1 ...
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... COMP - PWM DRV LOGIC + Izero COMP - COMP + I SENSE COMP - LATCH PWM DRV LOGIC + Izero COMP - SP6659 1.5MHz, 600mA Synchronous Buck Regulator 6 FUNCTIONAL DIAGRAMS 2 OUT 3 C OUT 2 GND 2 OUT ...
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... OUT R2 The external resistive divider is connected to the output as shown in Figure 20 . The SP6659 is a monolithic switching mode Step-Down DC-DC converter. It utilizes in- ternal MOSFETs to achieve high efficiency and can generate very low output voltage by using its internal reference at 0.6V. It operates at a fixed switching frequency, and uses slope compensated, current-mode architecture ...
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... DROPOUT When the input voltage decreases toward the value of the output voltage, the SP6659 allows the main switch to remain on for more than one switching cycle and increases the duty cycle until it reaches 100%. ...
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... Toko D312C 3.3 180 4.7 240 Inductor in Bold is used on the SP6659EB evaluation Board Table 1: Typical Surface Mount Inductors Date: 9/25/06 Rev C ________________ INPUT CAPACITOR The input capacitor reduces the surge cur- rent drawn from the input and switching noise from the device. The input capacitor ...
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... BSC 0.038 BSC 1.90 BSC 0.075 BSC JL Aug4-05 / Rev A SP6659 1.5MHz, 600mA Synchronous Buck Regulator 10 PACKAGE: 5 PIN TSOT23 SIDE VIEW A2 A Seating A1 Plane MAX - 0.043 - 0.004 0.039 - 0.008 0.024 4º 8º 12º ...
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... SP6659EK1/TR .... ...............................-40°C to +85°C ........................................................... 5 Pin TSOT23 SP6659EK1-1-5 .... ...............................-40°C to +85°C ........................................................... 5 Pin TSOT23 SP6659EK1-1-5/TR...............................-40°C to +85°C .......................................................... 5 Pin TSOT23 SP6659EK1-1-8 .... ...............................-40°C to +85°C ........................................................... 5 Pin TSOT23 SP6659EK1-1-8/TR...............................-40°C to +85°C .......................................................... 5 Pin TSOT23 Available in lead free packaging. To order add "-L" suffix to part number. ...