Freescale Semiconductor, Inc. MOTOROLA Document order number: MC34710 Rev 1.0, 04/2004 SEMICONDUCTOR TECHNICAL DATA Preliminary Information 34710 Adjustable Dual Output Switching Power Supply Freescale Semiconductor, Inc... The 34710 is a dual-output power regulator IC that integrates a switching regulator, a linear regulator, supervisor circuitry, and a power supply sequencer. With a wide operating input voltage range of 12 V to 32 V and robust temperature limits, the 34710 is applicable in many commercial and industrial applications that use an MCU. ADJUSTABLE DUAL OUTPUT SWITCHING POWER SUPPLY A user-selectable 5.0 V/3.3 V buck switching regulator is provided for board-level I/Os and user circuitry. The regulator is capable of delivering up to 1.0 A. The MCU core voltage is an adjustable 3.3 V/2.5 V/1.8 V/1.5 V linear voltage regulator that can supply up to 500 mA. The switching and linear regulator output voltage are determined through three digital input mode terminals that can be controlled by an MCU. Features • High-Current Adjustable 5.0 V/3.3 V Switching Regulator • Low Noise User-Selectable 3.3 V/2.5 V/1.8 V/1.5 V Linear Regulator • On-Chip Thermal Shutdown and Error Reset Circuitry • Supervisory Functions (Power-ON Reset and Error Reset Circuitry) • Sequenced I/O and Core Voltages • Pb-Free Packaging Designated by Suffix Code EW EW (Pb-FREE) SUFFIX CASE 1324-02 32-LEAD SOICW-EP ORDERING INFORMATION Device Temperature Range (TA) Package PC34710EW/R2 0°C to 85°C 32 SOICW-EP Simplified Application Diagram 34710 Simplified Application Diagram 12 V to 32 V 34710 B+ Vb VSWITCH CP2 VI/O VI/O_OUT CP1 Mode0 Mode1 Mode2 MCU LINB+ RST VCORE VCORE GND This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. © Motorola, Inc. 2004 For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. B+ 2000 Hz Oscillator Charge Pump Freescale Semiconductor, Inc... Supervisory and Temperature Shutdown CP1 CP2 Vb RST Ct Bandgap MODE0 MODE1 MODE2 LINB+ VI/O Switching Regulator VCORE Linear Regulator VI/O_OUT VSWITCH VCORE (2) GND Figure 1. 34710 Simplified Internal Block Diagram 34710 2 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. RST MODE0 MODE1 MODE2 NC NC NC NC NC NC NC NC GND NC NC NC 1 32 2 31 3 30 4 29 5 28 6 27 7 26 8 25 9 24 10 23 11 22 12 21 13 20 14 19 15 18 16 17 Ct CP1 CP2 Vb B+ VSWITCH VI/O_OUT LINB+ VCORE VCORE NC NC NC NC NC NC TERMINAL FUNCTION DESCRIPTION Terminal Terminal Name Formal Name 1 RST Reset 2 3 4 MODE0 MODE1 MODE2 Mode Control These input terminals control VI/O_OUT and VCORE output voltages. 5–12, 14–22 NC No Connects No internal connection to this terminal. 13 GND Ground 23, 24 VCORE Core Voltage Regulator Output Core regulator output voltage. 25 LINB+ Core Voltage Regulator Input Core regulator input voltage. 26 VI/O_OUT VI/O Switching Regulator Feedback Feedback terminal for VI/O switching regulator and internal logic supply. 27 VSWITCH VI/O Switching Regulator Switch Output VI/O switching regulator switching output. 28 B+ Power Supply Input 29 Vb Boost Voltage 30 CP2 Switching Capacitor 2 Charge pump capacitor connection 2. 31 CP1 Switching Capacitor 1 Charge pump capacitor connection 1. 32 Ct Reset Delay Capacitor Reset delay adjustment capacitor. Definition Reset input and output. This terminal is open drain. Ground. Regulator input voltage. Boost voltage storage node. MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 3 Freescale Semiconductor, Inc. MAXIMUM RATINGS All voltages are with respect to ground unless otherwise noted. Rating Symbol Max Unit GLOBAL ABSOLUTE MAXIMUM RATINGS VB+ Input Power Supply Voltage V -0.3 to 36 IB + = 0 A Terminal Soldering Temperature (Note 1) Power Dissipation (Note 2) TSOLDER 260 °C PD 3.0 W VESD1 ±2000 RθJA 45 V ESD Standoff Voltage Non-Operating, Unbiased, Human Body Model (Note 3) °C/W Freescale Semiconductor, Inc... Thermal Resistance Junction-to-Ambient (Note 4) Junction-to-Ambient (Note 2) RθJA 25 Junction-to-Case RθJC 2.0 Operating Ambient Temperature TA 0 to 85 °C Operating Device Junction Temperature TJ 105 °C GLOBAL OPERATING RATINGS VB+ Input Power Supply Voltage V 12 to 32 IB+ = 0 A to 3.0 A IB+(q) Quiescent Bias Current from B+ (Note 5) mA 7.5 VB+ = 12 V to 32 V TJ Operating Junction Temperature -0 to 105 °C VI/O SWITCHING REGULATOR (Note 6) Maximum Output Voltage Startup Overshoot (COUT = 330 µF) VI/O(STARTUP) V MODE0 = 0 5.4 MODE0 = Open 3.6 IVI/O Maximum Output Current A 1.2 TA = 0°C to 105°C Notes 1. Soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent damage to the device. 2. 3. With 2.0 in2 of copper headsink. ESD1 testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 Ω). 4. 5. 6. With no additional heatsinking. Maximum quiescent power dissipation is 0.25 W. 12 V ≤ VB+ ≤ 32 V and -20°C ≤ TJ ≤ 145°C unless otherwise noted. 34710 4 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. MAXIMUM RATINGS (continued) All voltages are with respect to ground unless otherwise noted. Rating Symbol Max Unit VCORE LINEAR REGULATOR (Note 7) Maximum Output Voltage Startup Overshoot (COUT = 10 µF) (Note 8) VCORE (STARTUP) MODE[2:0] = [0,x,0] 3.6 MODE[2:0] = [0,x,Open] 2.7 MODE[2:0] = [Open,x,0] 2.0 MODE[2:0] = [Open,x,Open] 1.65 IVCORE Maximum Output Current TJ = 0°C to 105°C, VLINB+ ≤ VCORE (NOM) + 0.8 V (Note 9) Freescale Semiconductor, Inc... V mA 500 Notes 7. 12 V ≤ VB+ ≤ 32 V and -20°C ≤ TJ ≤ 145°C unless otherwise noted. 8. 9. Refer to Table 1, page 10. Pulse testing with low duty cycle used. MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 5 Freescale Semiconductor, Inc. STATIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions 4.75 V ≤ VIO ≤ 5.25 V, 12 V ≤ VB+ ≤ 32 V, and 0°C ≤ TJ ≤ 105°C unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted. Characteristic Symbol Min Typ Max Unit VI/O SWITCHING REGULATOR VI/O Logic Supply Voltage (IVI/O = 25 mA to 1.0 A) MODE0 = 0 4.8 – 5.2 MODE0 = Open 3.15 – 3.45 IVI/O Logic Supply Current VI/O = Nominal, Power Dissipation in Switching Regulator = 0.45 W A 0.025 – 1.0 0.5 TBD 2.0 – – 2.5 Ω RDS(ON) Output On Resistance Freescale Semiconductor, Inc... V VB+ = 12 V to 32 V VI/O(SOFT) Soft Start Threshold Voltage MODE0 = X V A Current Limit Threshold (TJ = 25°C to 100°C) ILIMIT (OP) 2.1 – 3.2 ILIMIT (SOFT) 1.3 – 1.8 -0.5 – – MODE[2:0] = [0,x,0] 3.15 – 3.45 MODE[2:0] = [0,x,Open] 2.35 – 2.65 MODE[2:0] = [Open,x,0] 1.71 – 1.89 MODE[2:0] = [Open,x,Open] 1.425 – 1.575 Normal Operation Soft Start, VI/O ≤ 2.5 V Minimum Voltage Allowable on VSWITCH Terminal VVSWITCH (MIN) TJ = 25°C to 100°C V VCORE LINEAR REGULATOR Supply Voltage (IVCORE = 5.0 mA to 500 mA) (Note 10) VCORE (NOM) V IVCORE Supply Current VCORE = VCORE (NOM) mA 1.0 – 500 0.8 – – VCORE (NOM) + 1.0 – 10 800 – 1000 IVCORE(DROPOUT) VCORE Dropout Voltage VCORE = VCORE (NOM), IVCORE = 0.5 A VLINB+ Regulator Input Voltage VCORE = VCORE (NOM), IVCORE = 0.5 A V V ILIMIT Normal Current Limit Threshold TJ = 25°C to 100°C, VLINB+ = VCORE (NOM) + 1.0 V mA Notes 10. Refer to Table 1, page 10. 34710 6 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. STATIC ELECTRICAL CHARACTERISTICS (continued) Characteristics noted under conditions 4.75 V ≤ VIO ≤ 5.25 V, 12 V ≤ VB+ ≤ 32 V, and 0°C ≤ TJ ≤ 105°C unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted. Characteristic Symbol Min Typ Max Unit MODE TERMINALS OPERATING VOLTAGES VIL(MODEn) MODE Control Terminals Low Voltage V – – 0.825 2.6 – – TJ = 0°C to TBD°C, VB+ = 12 V to 14 V 7.0 – 12 TJ = 0°C to TBD°C, VB+ = 14 V to 32 V 8.0 – 13.2 VB+ (MIN) 9.0 – – V VB+(ASSERT) 2.0 – – V TJ = 0°C to TBD°C, VB+ = 12 V to 32 V VIH (MODEn) MODE Control Terminals High Voltage V TJ = 0°C to TBD°C, VB+ = 12 V to 32 V Freescale Semiconductor, Inc... MODE Control Terminals Voltage with Input Floating VMODE(FLOAT) V SUPERVISOR CIRCUITRY Minimum Function VB+ for Charge Pump and Oscillator Running Minimum VB+ for RST Assertion, VB+ Rising VOL RST Low Voltage V – VB+ = 2.0 V, IRST ≤ 5.0 mA – 0.4 – VI/O(NOM) – V RST VI/O Threshold VI/O Rising VI/O t+ – VI/O Falling VI/O t- VI/O (NOM) - 225 mV – VHYSVI/O 10 – 100 – VCORE (NOM) - 225 mV – – 10 – 100 RST Hysteresis for VI/O - 80 mV mV V RST VCORE Threshold VCORE Rising VCORE t+ – VCORE Falling VCORE t- VCORE (NOM) - 80 mV VHYS CORE RST Hysteresis for VCORE mV VB+ = 12 V to 32 V VCORE (SHUTDOWN) VCORE - VI/O for VCORE Shutdown V – – TBD 170 – – 20 – TBD VB+ +10 V – VB+ +12 V VB+ = 12 V to 32 V °C TJ (TSD) Thermal Shutdown Temperature TJ Rising TJ (HYSTERESIS) Overtemperature Hysteresis °C Vb CHARGE PUMP Vb Boost Voltage (Note 11) VB+ = 12 V to 32 V, Ivb = 0.5 mA V Notes 11. Bulk capacitor ESR ≤ 10 Ω. MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 7 Freescale Semiconductor, Inc. DYNAMIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions 4.75 V ≤ VIO ≤ 5.25 V, 12 V ≤ VB+ ≤ 32 V, and 0°C ≤ TJ ≤ 105°C unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted Characteristic Symbol Min Typ Max Unit D 45 – 55 % 25 – – VI/O SWITCHING REGULATOR Duty Cycle tr, tf Switching Rise and Fall Time Load Resistance = 100 Ω, VB+ = 30 V tr + tf Switching Rise and Fall Time Load Resistance = 100 Ω, VB+ = 30 V Freescale Semiconductor, Inc... ns ns – – 50 48 – 82 1.0 – 6.0 – – 125 30 – – SUPERVISOR CIRCUITRY ms t delay RST Delay Cdelay = 0.1 µF µs t filter RST Filter Time VB+ = 9.0 V ns tf RST Fall Time CL = 100 pF, RPULLUP = 4.7 kΩ, 90% to 10% t slpl (Note 13) External Low (Note 12) VI/O = 5.0 V RST Recovery Time Before Next RST Input (Note 12) ns µs t phsl VI/O = 5.0 V – – 10 140 – 260 INTERNAL OSCILLATOR Charge Pump and VI/O Switching Regulator Operating Frequency VB+ = 9.0 V to 32 V f OP kHz Notes 12. See Figure 2, RST Timing, page 9. 13. t slpl is an input. 34710 8 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Timing Diagram External RST Input VIH VIL Freescale Semiconductor, Inc... t snl t phsl t slpl 34710 t delay RST VIH VIL Figure 2. RST Timing MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 9 Freescale Semiconductor, Inc. SYSTEM/APPLICATION INFORMATION INTRODUCTION VI/O Switching Regulator The VI/O switching regulator output voltage is determined by the MODE digital input terminals. The 34710’s MODE[2:0] select the output voltage (Table 1). For example, if MODE[2:0] = 0, 0, 0, then VI/O = 5.0 V; if MODE[2:0] = Open, Open, Open, then VI/O = 3.3 V. The MODE0 terminal controls the output voltage of both regulators. Freescale Semiconductor, Inc... The topology of the regulator is a bang-bang buck regulator operating from the internal ~200 kHz oscillator. VCORE Linear Regulator The VCORE linear regulator can produce a +3.3 V, 2.5 V, 1.8 V, or 1.5 V output voltage at 500 mA. The input to the VCORE regulator is a terminal that may be connected to the VI/ O regulator output. The minimum input voltage must be VCORE(NOM) + 0.8 V. The MODE[2:0] terminals select the output voltage as depicted in Table 1. Table 1. VI/O and VCORE(NOM) Regulator Output Voltage Selection MODE2 MODE1 MODE0 VI/O (V) VCORE(NOM) (V) 0 0 0 5.0 3.3 0 0 Open 3.3 2.5 0 Open 0 5.0 1.8 0 Open Open 3.3 1.8 Open 0 0 5.0 2.5 Open 0 Open 3.3 2.5 Open Open 0 5.0 1.5 Open Open Open 3.3 1.5 Open indicates terminal is not connected externally. SUPERVISORY AND MISCELLANEOUS FUNCTIONS Introduction The supervisor circuitry provides control of the RST line, an open drain signal, based on system operating conditions monitored by the 34710. VI/O, VCORE, VB+, and thermal shutdown (TSD) detectors in various parts of the chip are monitored for error conditions. Because other devices in the system may trigger a reset, the RST line itself is also monitored, but the supervisor circuitry controls all reset timing, including externally generated resets. Driving the RST line low causes the system to be held in the reset state. VI/O, VCORE, VB+, and thermal shutdown have both positive- and negative-going thresholds. The supervisor circuitry also ensures that the power supplies sequence properly. Specifically, that VI/O is never less than TBD V below VCORE. This means that VCORE - VI/O will be clamped at 0.5 V, and that the VCORE regulator operation will be suppressed during startup and shutdown to ensure that VCORE - VI/O = TBD V. Static Operating Specifications The RST output is an I/O device with an open drain output driver with a pullup and a CMOS digital input gate (Figure 3). This I/O structure allows wired OR connection to the MCU’s RST I/O terminal, as well as allowing the MCU to initiate a reset cycle by driving its RST terminal low. When responding to a MCU request for a reset cycle, the 34710 must respond rapidly enough to prevent a glitch. Figure 2, page 9, shows the timing 34710 10 parameters for responding to an externally applied RST signal. The rise time may be relatively slow, depending on the load capacitance, and the internal RST input gate must operate reliably (no oscillations during the transition) under these conditions, i.e., the RST input can be inhibited for up to tphsl(MAX). Error conditions must be present for a minimum time, tfilter, before the 34710 responds to them. Once all error conditions are cleared, RST is held low for an additional time of tdelay. If any monitored item falls below its negative-going threshold for tfilter, 1.0 µs to 6.0 µs, the tdelay will be restarted when system operating conditions are met. The trigger for the tdelay retriggerable one shot should be ([VI/O(LOW) + VCORE(LOW) + VB+(LOW) + TJ(TSD)] & tfilter), where tfilter is the 1.0 µs to 6.0 µs delay. VI/O To Internal Gates From Internal Reset Circuits RPULLUP ≥ 4.7 kΩ (Optional) RST CLOAD (Optional) Figure 3. RST Terminal Interface MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Vb Charge Pump Internal Oscillator The high-side MOSFETs in the H-Bridge motor drivers and voltage regulators switch require a gate voltage in excess of VB+, which is provided by the Vb supply. The Vb regulator is a charge pump, switching directly off the VB+ supply, and uses an internal oscillator operating at 200 kHz. The internal oscillator provides timing for the charge pump and switching regulators. APPLICATIONS Power Dissipation Freescale Semiconductor, Inc... The power budget is described in Table 2. The maximum dissipation for this device is 1.0 W continuous. Table 2. Power Budget Functional Block Watt Bias 0.00 Charge Pump 0.15 Switching Regulator 0.45 Linear Regulator 0.35 Total 0.95 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 11 Freescale Semiconductor, Inc. PACKAGE DIMENSIONS EW (Pb-FREE) SUFFIX 32-LEAD SOICW-EXPOSED PAD PLASTIC PACKAGE CASE 1324-02 ISSUE A 10.3 7.6 7.4 C 5 Freescale Semiconductor, Inc... 1 B 2.65 2.35 9 30X 32 0.65 PIN 1 ID 4 B 9 B 16 11.1 10.9 CL 17 A 5.15 32X 2X 16 TIPS 0.3 0.10 A A B C A (0.29) A 0.25 0.19 6 0.13 BASE METAL (0.203) 0.38 0.22 M C A R0.08 MIN 0.25 PLATING M B SECTION A-A ROTATED 90 ° CLOCKWISE 34710 12 SEATING PLANE NOTES: 1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 3. DATUMS B AND C TO BE DETERMINED AT THE PLANE WHERE THE BOTTOM OF THE LEADS EXIT THE PLASTIC BODY. 4. THIS DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURRS. MOLD FLASH, PROTRUSION OR GATE BURRS SHALL NOT EXCEED 0.15 MM PER SIDE. THIS DIMENSION IS DETERMINED AT THE PLANE WHERE THE BOTTOM OF THE LEADS EXIT THE PLASTIC BODY. 5. THIS DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH AND PROTRUSIONS SHALL NOT EXCEED 0.25 MM PER SIDE. THIS DIMENSION IS DETERMINED AT THE PLANE WHERE THE BOTTOM OF THE LEADS EXIT THE PLASTIC BODY. 6. THIS DIMENSION DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED 0.4 MM PER SIDE. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSION AND ADJACENT LEAD SHALL NOT LESS THAN 0.07 MM. 7. EXACT SHAPE OF EACH CORNER IS OPTIONAL. 8. THESE DIMENSIONS APPLY TO THE FLAT SECTION OF THE LEAD BETWEEN 0.10 MM AND 0.3 MM FROM THE LEAD TIP. 9. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM. THIS DIMENSION IS DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, TIE BAR BURRS, GATE BURRS AND INTER-LEAD FLASH, BUT INCLUDING ANY MISMATCH BETWEEN THE TOP AND BOTTOM OF THE PLASTIC BODY. GAUGE PLANE 8 8° 0° 0° MIN 0.29 0.13 0.9 0.5 SECTION B-B MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... NOTES MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 13 Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... NOTES 34710 14 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... NOTES MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com 34710 15 Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. Information in this document is provided solely to enable system and software implementers to use Motorola products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document. Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. 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