MC34704 FREESCALE [Freescale Semiconductor, Inc], MC34704 Datasheet
MC34704
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MC34704 Summary of contents
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... LCD MPU V IO2 GND REG 5 PGND +5V *REG 1 VREF 16V) *REG 6 *REG 7 VREF- (-5 to -9V) * Available only in 34704A device Document Number: MC34704 Rev. 3, 7/2008 34704 MULTI-CHANNEL IC EP SUFFIX (PB-FREE) 98ASA10751D 56-PIN QFN ORDERING INFORMATION Temperature Package Range ( -20°C to 85°C 56 QFN EP ...
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... Table 1. Device Variations Orderable Part Number MC34704AEP/R2 MC34704BEP/R2 34704 2 No. of Regulators Regulator Number 8 Reg Reg Analog Integrated Circuit Device Data Freescale Semiconductor ...
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REG8 OUT8 SW8 PWM VG BT8 FB8 REG7 (34704A) OUT7 DRV7 PWM FB7 VREF7 COMP7 REG6 (34704A) VOUT6 SW6 VG BT6 FB6 VG BT5D PVIN5 SW5D VOUT5 SW5U VG BT5U COMP5 FB5 VG VDDI VDDI (2.5V) VDDIMON (VDDIdet) SCL 2 ...
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PIN CONNECTIONS BT5U 1 BT4D PVIN4 4 SW4D VOUT4 5 SW4U 6 Exposed Pad BT4U 7 PGND FB4 8 COMP4 9 BT3 10 ...
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Table 2. 34704 Pin Definitions (continued) A functional description of each pin can be found in the Functional Pin Description section beginning on Pin Number Device Pin Name Pin Function 11 A/B PVIN3 Power 12 A/B SW3 Output 13 A/B ...
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PIN CONNECTIONS Table 2. 34704 Pin Definitions (continued) A functional description of each pin can be found in the Functional Pin Description section beginning on Pin Number Device Pin Name Pin Function 30 A FB7 Input B AGND1 - 31 ...
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Table 2. 34704 Pin Definitions (continued) A functional description of each pin can be found in the Functional Pin Description section beginning on Pin Number Device Pin Name Pin Function 46 A/B PVIN2 Power 47 A/B SW2D Input/Output 48 A/B ...
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ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 3. 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. Ratings ELECTRICAL RATINGS Battery Input Supply Voltage (VIN) Pin ...
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STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic POWER INPUT Input Supply Voltage Typical Range (6) Input DC Supply Current VIN Pin Only All regulators ...
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic REGULATOR 2 Output Voltage Range Output Accuracy (8) Line/Load Regulation Dynamic Voltage Scaling Range ...
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Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic REGULATOR 4 Output Voltage Range Output Accuracy (9) Line/Load Regulation Dynamic Voltage Scaling Range Dynamic Voltage Scaling Step Size ...
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic PVIN5 Leakage Current (Off State) @25°C SW5D Leakage Current (Off State) @25°C SW5U Leakage ...
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Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic REGULATOR 8 Output Voltage Range (Li-Ion Battery) Output Accuracy Dynamic Voltage Scaling Range Dynamic Voltage Scaling Step Size (13) ...
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ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic FREQ Selectable Switching Frequency 1 Selectable Switching Frequency 2 Selectable Switching Frequency ...
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Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 2.7V values noted reflect the approximate parameter means at T Characteristic REGULATOR 3 Li-Ion Battery Operating Frequency Operating Frequency Selection Step Size REGULATOR 4 Li-Ion Battery Operating Frequency Operating Frequency Selection ...
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FUNCTIONAL DESCRIPTION INTRODUCTION The 34704 is an multi-channel power management IC (PMIC) meant to address power management needs for various multimedia applications microprocessors in various configurations with a target overall efficiency of > 80% at typical loads. REGULATOR REGULATOR TYPE ...
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REG5 BOOST STAGE BOOTSTRAP CAPACITOR INPUT PIN (BT5U) Connect capacitor between this pin and SW5U pin to enhance the gate of the Switch Power MOSFET. REG4 BUCK STAGE BOOTSTRAP CAPACITOR INPUT PIN (BT4D) Connect a 0.01 F ...
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FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION REG1 REGULATED OUTPUT VOLTAGE PIN (VOUT1) (34704A ONLY) Connect this pin directly to the load directly and to the output filter as close to the pin as possible. REG1 BOOTSTRAP CAPACITOR INPUT PIN (BT1) Connect ...
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REG2 BUCK STAGE SWITCHING NODE (SW2D) The inductor is connected between this pin and the SW2U pin. REG2 REGULATED OUTPUT VOLTAGE PIN (VOUT2) Connect this pin to the load and to the output filter as close to the pin as ...
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... Phase Control I2C Communication & Registers Internal Bias Circuit Fault Detection & Protection Figure 4. MC34704 Functional Internal Block Diagram INTERNAL BIAS CIRCUIT Gate Driver Voltage (VG) REG1/VG is the main regulator of the 34704 IC and will be used to supply internal circuitry and voltage biases through the VG output ...
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A hard over-current limit (short-circuit limit) that is higher than the cycle by cycle limit at which the device reacts by shutting down the output immediately. This is ...
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FUNCTIONAL DESCRIPTION FUNCTIONAL INTERNAL BLOCK DESCRIPTION REGUALATOR OVERVIEW WITH EFFICIENCY ANALYSIS REG1 (34704A Only) REG1 is a synchronous boost PWM voltage-mode control DC/DC regulator available only in the 34704A. Even though REG1 is a synchronous regulator recommended to ...
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The switcher will operate in DCM at very light loads to allow pulse skipping. VOUT3 will be discharged every time the regulator is shutting down and it will be held low by the discharge FET as long as possible. Characteristics ...
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FUNCTIONAL DESCRIPTION FUNCTIONAL INTERNAL BLOCK DESCRIPTION Operation Modes The switcher will be active when: • regulation AND • There is no GrpC (OR GrpE) shutdown command through 2 the I C interface AND • No faults exist ...
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Output voltage is adjustable by means of an external resistor divider when in voltage regulation mode • A 240mV current limit comparator will be used to program/ sense the voltage drop across the current setting resistor at the bottom ...
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FUNCTIONAL DESCRIPTION FUNCTIONAL INTERNAL BLOCK DESCRIPTION OVERALL EFFICIENCY ANALYSIS In battery applications highly recommended to power every single regulator directly from the battery to obtain full output capability: VBAT REG1 V1 (5.0V) VBAT REG2 V2 (2.8 / 3.3V) ...
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FUNCTIONAL DEVICE OPERATION POWER-UP SEQUENCE Following is the power up sequence from a battery connection or a Power On signal through the ONOFF pin. 1. Battery initially connected to VIN. 2. LION pin is used to determine if a battery ...
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FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES • In any of the previous shutdown sequences, VG output will stay alive to maintain internal circuitry and logic until all other regulators are off, then it will shut off. POWER SUPPLY The battery voltage ...
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Turn On During this time, the processor can abort the shutdown process or shutdown immediately before the 2nd period 2 elapses with command RST OUTPUT SIGNAL PIN This is a power reset output signal. It ...
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FUNCTIONAL DEVICE OPERATION LOGIC COMMANDS AND REGISTERS USER INTERFACE 2 The 34704 communicates via I C using a default device address $54 to access all user registers and program all regulators features independently. USER PROGRAMMABLE REGISTERS GrpC/E ...
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OV/UV Response A (Default) B Dynamic Voltage Scaling for each regulator The customer can adjust each regulator’s output dynamically with 2.5% step size. The total range of adjustability will vary depending on each regulator to accommodate different operating environments. Some ...
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FUNCTIONAL DEVICE OPERATION LOGIC COMMANDS AND REGISTERS Soft Start MSB 0.5ms 0 2ms 0 8ms 1 32ms 1 REG8 Regulation Mode The 34704 assigns a 1-bit register to indicate REG8’s regulation mode ( REG8MODE Register ). The processor assigns this ...
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SCF False True Over-voltage Fault Register The 34704 assigns a 1-bit register for each regulator ( OVFx Register ) to indicate a fault due to over-voltage limit, where x corresponds to each regulator from REG1 to REG8 OVF False True ...
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FUNCTIONAL DEVICE OPERATION LOGIC COMMANDS AND REGISTERS REGISTER DISTRIBUTION Each regulator has a fault register that records any fault that occurs in that regulator. Then there is a regulator fault reporting register that the processor can access ...
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Addr Name D7 D6 $00 Reserved $01 GENERAL1 $02 GENERAL2 $03 GENERAL3 Reserved $04 - $05 VGSET2 $06 REG2SET1 - $07 REG2SET2 $08 REG3SET1 - $09 REG3SET2 $0A REG4SET1 - $0B REG4SET2 $0C REG5SET1 $0D REG5SET2 - $0E REG5SET3 $0F- ...
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FUNCTIONAL DEVICE OPERATION COMPONENT CALCULATION F AND GENERAL SOFT START SW1 CONFIGURATION The 34704 uses F as the switching frequency for SW1 REG1(VG) thru REG5, and this can be changed by applying a voltage between 0 to 2.5V to the ...
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------------------------------------------ - ESR [ ] Io ⎛ ⎞ max --------------------- - + I ⎝ ⎠ – max • 1CVG : Use a 47uF capacitor from Ground to VG. • ...
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FUNCTIONAL DEVICE OPERATION COMPONENT CALCULATION 1. Output LC filter cutoff frequency (F 1 ------------------------- - OUT 2. Cutoff frequency due to capacitor ESR ------------------------------------- - ESR 2 C ESR OUT 3. Crossover ...
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Compensating for boost operation: • boost power stage can be designed to operate in CCM for load currents above a certain level usually 5 to 15% of full load. The minimum value of inductor to maintain CCM can ...
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FUNCTIONAL DEVICE OPERATION COMPONENT CALCULATION The passive components associated to these frequencies are calculated with the following formulas ⎛ ⎞ Vin 1 1 ⎛ ⎞ min ------------------ ---------------- ---------------------------- - C1 = ⎜ ⎟ ⎝ ⎠ ...
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It does not need external compensation network, thus the only components that need to be calculated are: • boost power stage can be designed to operate in CCM for load currents above a certain level usually ...
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FUNCTIONAL DEVICE OPERATION COMPONENT CALCULATION 0.9 --------------------------------- - 1.5 Vo – – 0.9 NOTE not grounded, instead is connected to VREF7 pin (VREF7=1.5V) which provide a positive voltage to assure a positive voltage at the ...
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VIN (19) REG8 V8 SW8 BT8 FB8 VIN VOUT7 DRV7 V7 FB7 VREF7 COMP7 VIN VOUT6 V6 SW6 BT6 FB6 VIN BT5D PVIN5 SW5D VOUT5 V5 SW5U BT5U FB5 COMP5 VDDI VBUS SCL SDA V2 RST VIN VIN AGND Notes ...
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TYPICAL APPLICATIONS VIN (21) REG8 SW8 BT8 FB8 VIN PVIN5 BT5D SW5D VOUT5 V5 SW5U BT5U FB5 COMP5 VIN PVIN4 BT4D SW4D VOUT4 V4 SW4U BT4U FB4 COMP4 VDDI VBUS SCL SDA V2 RST VIN VIN PGND (EXPAD) Notes 20. ...
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For the most current package revision, visit www.freescale.com and perform a keyword search using the “98A” listed below. Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGING PACKAGE DIMENSIONS EP SUFFIX 56-PIN 98ASA10751D REVISION A PACKAGING PACKAGE DIMENSIONS 34704 45 ...
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PACKAGING PACKAGE DIMENSIONS (CONTINUED) 34704 46 PACKAGE DIMENSIONS (CONTINUED) EP SUFFIX 56-PIN 98ASA10751D REVISION A Analog Integrated Circuit Device Data Freescale Semiconductor ...
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Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGE DIMENSIONS (CONTINUED) EP SUFFIX 56-PIN 98ASA10751D REVISION A PACKAGING PACKAGE DIMENSIONS (CONTINUED) 34704 47 ...
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REVISION HISTORY REVISION DATE DESCRIPTION OF CHANGES 4/2008 • Initial Release 2.0 • Revised 6/2008 3 • Revised • Revised • Revised on page 44 34704 48 REVISION HISTORY 34704 Simplified Application Diagram on page 1 34704 Internal Block Diagram ...
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... Freescale Semiconductor Literature Distribution Center P.O. Box 5405 Denver, Colorado 80217 1-800-441-2447 or 303-675-2140 Fax: 303-675-2150 LDCForFreescaleSemiconductor@hibbertgroup.com MC34704 Rev. 3 7/2008 Information in this document is provided solely to enable system and software implementers to use Freescale Semiconductor 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 ...