MC34716EP Freescale Semiconductor, MC34716EP Datasheet

IC CONVERTER DDR 26QFN

MC34716EP

Manufacturer Part Number
MC34716EP
Description
IC CONVERTER DDR 26QFN
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC34716EP

Applications
Converter, DDR
Voltage - Input
3 ~ 6 V
Number Of Outputs
2
Voltage - Output
0.7 ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
26-QFN
Output Voltage
0.7 V to 3.6 V
Output Current
5 A
Input Voltage
3 V to 6 V
Switching Frequency
1 MHz
Operating Temperature Range
- 40 C to + 85 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC34716EP
Manufacturer:
FREESCALE
Quantity:
20 000
Freescale Semiconductor
Advance Information
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007-8. All rights reserved.
1.0 MHz Dual Switch-Mode DDR
Power Supply
synchronous buck switching regulator with integrated N-channel
power MOSFETs. It is a high performance point-of-load (PoL) power
supply with its second output having the ability to track an external
reference voltage. it provides a full power supply solution for Double-
Data-Rate (DDR) Memories.
channel two can sink and source up to 3.0 A. Both channels are highly
efficient with tight output regulation. With its high current drive
capability, channel one can be used to supply the V
memory chipset. The second channel’s ability to track a reference
voltage makes it ideal to provide the termination voltage (V
modern data buses. The 34716 also provides a buffered output
reference voltage (V
supervisory, and protection functions to allow for easy implementation
of complex designs. It is housed in a Pb-free, thermally enhanced,
and space efficient 26-Pin Exposed Pad QFN.
The 34716 is a highly integrated, space-efficient, low cost, dual
Channel one provides a source only, 5.0 A drive capability, while
The 34716 offers the designer the flexibility of many control,
Features
• 50 m
• Input voltage operating range from 3.0 to 6.0 V
• ±1% accurate output voltages, ranging from 0.7 to 3.6 V
• The second output tracks 1/2 an external reference voltage
• ±1% accurate buffered reference output voltage
• Programmable switching frequency range from 200 kHz to
• Programmable soft start timing for channel one
• Over-current limit and short-circuit protection on both channels
• Thermal shutdown
• Output over-voltage and under-voltage detection
• Active low power good output signal
• Active low standby and shutdown inputs
• Pb-free packaging designated by suffix code EP.
1.0 MHz
Ω
integrated N-channel power MOSFETs
REFOUT
V
DDQ
3.0 V to 6.0 V
) to the memory chipset
V
IN
Figure 1. 34716 Simplified Application Diagram
PGND1
VIN
PVIN1
BOOT1
SW1
VOUT1
INV1
COMP1
VDDI
FREQ
ILIM1
GND
34716
VREFOUT
VREFIN
COMP2
PGND2
BOOT2
VOUT2
DDQ
PVIN2
STBY
INV2
SW2
PG
SD
to the
TT
) for
V
IN
DDR Memory
VDDQ
V
Chipset
DDQ
V
MC34716EP/R2
TT
Device
V
DUAL SWITCH-MODE DDR POWER
REF
Memory Bus
ORDERING INFORMATION
Termination
Resistors
98ASA10728D
34716
Temperature
Document Number: MC34716
26-PIN QFN
EP SUFFIX
Range (T
-40 to 85°C
SUPPLY
DDR Memory
Controller
MCU
A
)
Rev 4.0, 12/2008
Package
26 QFN

Related parts for MC34716EP

MC34716EP Summary of contents

Page 1

... This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2007-8. All rights reserved. DUAL SWITCH-MODE DDR POWER to the DDQ ) for TT Device MC34716EP/R2 34716 PVIN2 VIN V DDQ VREFIN PVIN1 BOOT1 ...

Page 2

... Generator V BG Discharge CHANNEL 1 M10 Discharge GND VREFOUT Thermal Monitoring Bandgap Regulator VDDI Internal Voltage Regulator VIN BOOT2 PVIN2 M6 Gate SW2 I SENSE Driver M7 PGND2 – COMP2 Error Amplifier – INV2 M9 VOUT2 Discharge CHANNEL 2 + VREFIN Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 3

... Output 6 INV1 Input 7 COMP1 Input 8 VREFIN Input 9 VREFOUT Output 10 PG Output 11 SD Input 12 COMP2 Input 13 INV2 Input Analog Integrated Circuit Device Data Freescale Semiconductor PIN CONNECTIONS Transparent Top View 3 PIN Figure 3. 34716 Pin Connections Formal Name Channel 1 Bootstrap capacitor input pin ...

Page 4

... Internal supply voltage output Internal Supply Voltage Standby mode input control pin Standby Input Thermal pad for heat transfer. Connect the thermal pad to the analog Thermal Pad ground and the ground plane for heat sinking. page 12. Definition Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 5

... Temperature and Moisture Sensitivity Levels (MSL www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics. 6. Maximum power dissipation at indicated ambient temperature. Analog Integrated Circuit Device Data Freescale Semiconductor ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Symbol V ...

Page 6

... Thermal resistance between the device and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on the top surface of the board near the package. 34716 6 Symbol Value (8) R θJA (9) R θJMA R QJB Analog Integrated Circuit Device Data Unit 93 °C/W 32 °C/W 13.6 °C/W Freescale Semiconductor ...

Page 7

... Overall output accuracy is directly affected by the accuracy of the external feedback network, 1% feedback resistors are recommended. 14. ±1% is assured at room temperature. Analog Integrated Circuit Device Data Freescale Semiconductor ≤ 6 40°C ≤ T ≤ 85°C, GND = 0 V, unless otherwise noted. Typical 25°C under nominal conditions, unless otherwise noted. ...

Page 8

... MHz - 7.0 - V/µs -3.0 0 3.0 mV -1.0 - 1.0 µA - 170 - ° °C 2.5 - 6.0 V 0.7 - 1.35 V -1.0 - 1.0 % -1.0 - 1.0 % -1.0 - 1.0 % 0.0 - 1.35 V -8.0 - -1.5 % 1.5 - 8.0 % -3 mΩ mΩ Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 9

... Pulled up to VIN) Notes 19. Design information only, this parameter is not production tested. 20. The 1% accuracy is only guaranteed for V Analog Integrated Circuit Device Data Freescale Semiconductor ≤ 6 40°C ≤ T ≤ 85°C, GND = 0 V, unless otherwise noted. Typical 25°C under nominal conditions, unless otherwise noted. A ...

Page 10

... TIMEOUT1 t 5.0 FILTER1 t - RISE2 t - FALL2 t - OFFMIN t - ONMIN t - SS2 t - LIM2 t 80 TIMEOUT2 t 5.0 FILTER2 200 SW Analog Integrated Circuit Device Data Typ Max Unit 8 5 150 - ns (22 3.2 - 1.6 - 0 120 µ 12 150 - ns 100 - ns 1 120 µs 1.0 - MHz - 1000 kHz Freescale Semiconductor ...

Page 11

... IOUT, Amps Figure 4. % Efficiency vs. I Analog Integrated Circuit Device Data Freescale Semiconductor ≤ 6 40°C ≤ T ≤ 85°C, GND = 0 V, unless otherwise noted. Typical 25°C under nominal conditions, unless otherwise noted. A Symbol t PGRESET t TIMEOUT ...

Page 12

... Buck converter and discharge MOSFETs power ground the source of the buck converter low side power MOSFET. COMPENSATION INPUT (COMP1, COMP2) Buck converter external compensation network connects to this pin. Use a type III compensation network DDQ BUS DDR Memory Input Receiver Analog Integrated Circuit Device Data Freescale Semiconductor V REF ...

Page 13

... Analog Integrated Circuit Device Data Freescale Semiconductor FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION STANDBY INPUT (STBY) If this pin is tied to the GND pin, the device will be in Standby mode. If left unconnected or tied to the VIN pin, the device will be in Normal mode. The pin has an internal pull 1.5 MΩ ...

Page 14

... Disk mode) by sending a logic “0” to the SD pin. • Power Good Output Signal: The 34716 can communicate to an outside host that a fault has occurred by pulling the voltage on the PG pin high through a pull-up resistor. Figure 1, page 1). Oscillator Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 15

... This block provides the main function of the 34716 conversion from an un-regulated input voltage to a regulated output voltage used by the loads for reliable Analog Integrated Circuit Device Data Freescale Semiconductor operation. The buck converter is a high performance, fixed frequency (externally adjustable), voltage-mode control with a minimum on time of 100ns It drives integrated 50 mΩ ...

Page 16

... REF and V are lower than V TT REF can remain floating high, and be higher than TT internal DDI POR signal is DDI Analog Integrated Circuit Device Data Freescale Semiconductor UVF1 >=V OVR1 >=170°C J >=I LIM1 , DDQ DDQ ...

Page 17

... To Analog Integrated Circuit Device Data Freescale Semiconductor avoid erroneous under-voltage conditions µs filter is implemented. The buck converter will use its feedback loop to attempt to correct the fault ...

Page 18

... GND 15 14 C11 0.1 μF VOUT2 VO2 INV2 C230 R4 1 R18 300 C22 R2 1.8 nF 17.4 k_nopop Buck Converter 2 Vo2_2 L1 1.5 μH Vo2_1 VO2 R30 4.7_nopop C6 C7 100 μF 100 μ 100 μF 1 nF_nopop Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 19

... VMASTER 3 STBY_nopop 5 LED CON10A SD PVIN1 Capacitors PVIN1 0.1 μF 1.0 μF 100 μF 100 μF Analog Integrated Circuit Device Data Freescale Semiconductor PGOOD LED VIN Capacitors VIN C17 C16 10 μF 0.1 μF J1 VDDI 2 VREFIN STBY PVIN2 C5 100 μF Trimpots nopop VDDI ...

Page 20

... VOLTAGE APPLIED TO ILIM 1.19 - 1.49 V 3.2 1.50 - 1.81 V 1.6 1.82 - 2.13 V 0.8 2.14 - 2.50 V 0.4 VDDI R FQH FREQ R VDDI R FQL IH ILIM1 R IL GND Adjustment Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 21

... Maximum Current Step: − ( Vin _ min Vout Δ = Iout _ step Fsw Analog Integrated Circuit Device Data Freescale Semiconductor Inductor Current Rise Time The following formula will be helpful to find the maximum out allowed ESR. The effects of the ESR is often neglected by the design- ers and may present a hidden danger to the ultimate supply stability ...

Page 22

... This will help prevent 1 = noise on the buck regulator's power inputs (PVIN1 and π PVIN2) from injecting switching noise into the IC’s analog circuitry --------------------------------------- - C C • ------------------- - 2π π − Figure 13. These loops, and their associated Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 23

... Loop Curr ent SW1 Loop SD Current SD ON PGND1 and 2 BUCK CONVERTER 1 Analog Integrated Circuit Device Data Freescale Semiconductor recommended that vias be spaced evenly and have a finished diameter of 0.3 mm. PVIN1 and 2 VIN2 and 3 Loop Curr ent SW1 and 2 SW2 and 3 Loop LS Current ...

Page 24

... PACKAGING PACKAGING DIMENSIONS 34716 24 PACKAGING PACKAGING DIMENSIONS EP SUFFIX 26-PIN 98ASA10728D ISSUE 0 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 25

... Analog Integrated Circuit Device Data Freescale Semiconductor EP SUFFIX 26-PIN 98ASA10728D ISSUE 0 PACKAGING PACKAGING DIMENSIONS 34716 25 ...

Page 26

... Delay Timer • Changed Timeout Period • Changed definition for • Changed drawings in • Changed table for • Removed PC34716EP/R2 from the ordering information and added MC34716EP/R2 • Changed data sheet status to Advance Information • Made changes to 12/2007 4.0 SW2 Pins ...

Page 27

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer ...

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