PDF 34701 Data sheet ( Hoja de datos )

Número de pieza	34701
Descripción	Switch-Mode Power Supply
Fabricantes	Freescale Semiconductor
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No Preview Available ! www.DFaretaeSshceeatl4eUS.ceommiconductor Technical Data 1.5 A Switch-Mode Power Supply with Linear Regulator The 34701 provides the means to efficiently supply the Freescale Power QUICC™ I, II, and other families of Freescale microprocessors and DSPs. The 34701 incorporates a high- performance switching regulator, providing the direct supply for the microprocessor’s core, and a low dropout (LDO) linear regulator control circuit provides the microprocessor I/O and bus voltage. The switching regulator is a high-efficiency synchronous buck regulator with integrated N-channel power MOSFETs to provide protection features and to allow space-efficient, compact design. The 34701 incorporates many advanced features; e.g., precisely maintained up/down power sequencing, ensuring the proper operation and protection of the CPU and power system. Features • Operating Voltage from 2.8 V to 6.0 V • High-Accuracy Output Voltages • Fast Transient Response • Switcher Output Current Up to 1.5 A • Undervoltage Lockout and Overcurrent Protection • Enable Inputs and Programmable Watchdog Timer • Voltage Margining via I2C™ Bus • Reset with Programmable Power-ON Delay • Pb-Free Packaging Designated by Suffix Code EK I2C is a trademark of Philips Corporation. Document Number: MC34701 Rev 6.0, 2/2007 34701 POWER SUPPLY INTEGRATED CIRCUIT EK (PB-FREE) SUFFIX 98AARH99137A 32-PIN SOICW ORDERING INFORMATION Device MC34701EK/R2 Temperature Range (TA) -40 to 85°C Package 32 SOICW Optional 2.8 V to 6.0 V Input 34701 VIN2 VIN1 VBD VBST RT LDRV CS LDO ADDR SDA SCL GND EN1 EN2 CLKSYN CLKSEL FREQ LFB RST BOOT SW VOUT PGND INV VDDI Other Circuits Adjustable: 0.8 V to VIN - Dropout VDDH (I/Os) MPC8xxx VBST PORESET Adjustable: 0.8 V to VIN - Dropout VDDL (Core) Figure 1. 34701 Simplified Application Diagram Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to permit improvements in the design of its products. © Freescale Semiconductor, Inc., 2007. All rights reserved. 1 page ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 2. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. Rating Symbol Value Unit ELECTRICAL RATINGS Supply Voltage Switching Node Voltage Buck Regulator Bootstrap Input Voltage (BOOT - SW) Boost Regulator Output Voltage Boost Regulator Drain Voltage RST Drain Voltage Enable Pin Voltage at EN1, EN2 Logic Pin Voltage at SDA, SCL Analog Pin Voltage LDO, VOUT, RST LDRV, LCMP, CS Pin Voltage at CLKSEL, ADDR, RT, FREQ, VDDI, CLKSYN, INV, LFB ESD Voltage (1) Human Body Model Machine Model VIN1, VIN2 VSW VIN(BOOT) VBST VBD VRST VEN VLOG VOUT VLIN VLOGIC VESD -0.3 to 7.0 -1.0 to 7.0 -0.3 to 8.5 -0.3 to 8.5 -0.3 to 9.5 -0.3 to 7.0 -0.3 to 7.0 -0.3 to 7.0 -0.3 to 7.0 -0.3 to 8.5 -0.3 to 3.6 ±2000 ±200 V V V V V V V V V V V Notes 1. ESD1 testing is performed in accordance with the Human Body Model (CZAP=100 pF, RZAP=1500 Ω), ESD2 testing is performed in accordance with the Machine Model (CZAP=200 pF, RZAP=0 Ω), and the Charge Device Model. Analog Integrated Circuit Device Data Freescale Semiconductor 34701 5 5 Page ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 3. Static Electrical Characteristics (continued) Characteristics noted under conditions -40°C ≤ TA ≤ 85°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using the typical application circuit (see Figure 33) unless otherwise noted. Characteristic Symbol Min Typ Max Unit CONTROL AND SUPERVISORY CIRCUITS Enable (EN1, EN2) Input Voltage Threshold Enable (EN1, EN2) Pulldown Resistance VEN-TH REN-PD 1.0 1.5 2.0 V 30 55 90 kΩ RST Low-Level Output Voltage, IOL = 5.0 mA RST Leakage Current, OFF State, Pulled Up to 5.25 V RST Undervoltage Threshold on VOUT (∆VOUT/VOUT) (17) RST Overvoltage Threshold on VOUT (∆VOUT/VOUT) (17) RST Undervoltage Threshold on VLDO (∆VLDO/VLDO) (17) RST Overvoltage Threshold on VLDO (∆VLDO/VLDO) (17) VOL – – 0.4 V ILKG-RST – – 10 µA VOUTI Th -14 – -0.5 % VOUTI Th 0.5 – 14 % VLDOI Th -12 – -4.0 % VLDOI Th 4.0 – 12 % RST Timer Voltage Threshold VTH-RT 1.0 1.2 1.5 V RST Timer Source Current (RT pin at 0 V) IS-RT -17 – -34 mA RST Timer Leakage Current RST Timer Saturation Voltage, Reset Timer Current = 300 µA Maximum Recommended Value of the Reset Timer Capacitor I LKG-RT -1.0 – 1.0 µA VSAT-RT – 35 100 mV Ct – – 47 µF CLKSEL Threshold Voltage CLKSEL Pullup Resistance ADDR Threshold Voltage (17) ADDR Pullup Resistance Thermal Shutdown (IC sensor) (17) Thermal Shutdown Hysteresis (17) SDA, SCL PINS I2C BUS (STANDARD) VTHCLKS 1.2 1.6 2.0 V RPU-CLKS 60 120 240 kΩ VTHADDR 1.2 1.6 2.0 V RPU-ADDR 60 120 240 kΩ TLIM 150 170 190 °C TLIMHYS – 10 – °C Input Threshold Voltage (Pin SCL), Rising Edge (17) VLTH 1.3 – 1.7 V Input Threshold Voltage (Pin SDA) SDA, SCL Input Current, Input Voltage = 5.25 V (VIN1) VLTH IIN 1.3 – 1.7 V – 1.0 10 µA SDA Low-Level Output Voltage, 3.0 mA Sink Current SDA, SCL Capacitance (17) Notes 17. Design information only. This parameter is not production tested. VOL CInput – – 0.4 V – 7.0 10 pF Analog Integrated Circuit Device Data Freescale Semiconductor 34701 11 11 Page

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