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Спецификация 34710 изготовлена «Motorola Inc» и имеет функцию, называемую «Adjustable Dual Output Switching Power Supply». |
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Детали детали
Номер произв | 34710 |
Описание | Adjustable Dual Output Switching Power Supply |
Производители | Motorola Inc |
логотип |
16 Pages
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Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC34710
Rev 1.0, 04/2004
Preliminary Information
Adjustable Dual Output Switching
Power Supply
34710
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.
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
ADJUSTABLE DUAL OUTPUT
SWITCHING POWER SUPPLY
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_OUT
CP1
Mode0
Mode1
Mode2
LINB+
RST VCORE
GND
VI/O
VCORE
MCU
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
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Freescale Semiconductor, Inc.
B+
2000 Hz
Oscillator
Charge
Pump
CP1
CP2
Vb
Supervisory and
Temperature
Shutdown
RST
Ct
MODE0
MODE1
MODE2
LINB+
Bandgap
VI/O
Switching
Regulator
VCORE
Linear
Regulator
VI/O_OUT
VSWITCH
VCORE (2)
GND
Figure 1. 34710 Simplified Internal Block Diagram
34710
2
For More Information OMnOTTOhRiOsLAPAroNdALuOcGt,INTEGRATED CIRCUIT DEVICE DATA
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Freescale Semiconductor, Inc.
RST
MODE0
MODE1
MODE2
NC
NC
NC
NC
NC
NC
NC
NC
GND
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 Ct
31 CP1
30 CP2
29 Vb
28 B+
27 VSWITCH
26 VI/O_OUT
25 LINB+
24 VCORE
23 VCORE
22 NC
21 NC
20 NC
19 NC
18 NC
17 NC
TERMINAL FUNCTION DESCRIPTION
Terminal
Terminal
Name
Formal Name
1 RST
Reset
2 MODE0
3 MODE1
4 MODE2
Mode Control
5 – 12,
14 –22
NC
No Connects
13 GND
Ground
23, 24
VCORE
Core Voltage Regulator
Output
25
LINB+
Core Voltage Regulator
Input
26
VI/O_OUT
VI/O Switching Regulator
Feedback
27
VSWITCH
VI/O Switching Regulator
Switch Output
28 B+ Power Supply Input
29 Vb
Boost Voltage
30 CP2 Switching Capacitor 2
31 CP1 Switching Capacitor 1
32 Ct Reset Delay Capacitor
Definition
Reset input and output. This terminal is open drain.
These input terminals control VI/O_OUT and VCORE output voltages.
No internal connection to this terminal.
Ground.
Core regulator output voltage.
Core regulator input voltage.
Feedback terminal for VI/O switching regulator and internal logic supply.
VI/O switching regulator switching output.
Regulator input voltage.
Boost voltage storage node.
Charge pump capacitor connection 2.
Charge pump capacitor connection 1.
Reset delay adjustment capacitor.
MOTOROLA ANALOG INTEGRATED CIRFCoUrITMDoErVeICEInDfAoTrAmation On This Product,
Go to: www.freescale.com
34710
3
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