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PDF MC34710 Data sheet ( Hoja de datos )
| Número de pieza | MC34710 | |
| Descripción | Adjustable Dual Output Switching Power Supply | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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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
1 page  
Freescale Semiconductor, Inc.
MAXIMUM RATINGS (continued)
All voltages are with respect to ground unless otherwise noted.
Rating
Symbol
VCORE LINEAR REGULATOR (Note 7)
Maximum Output Voltage Startup Overshoot (COUT = 10 µF) (Note 8)
MODE[2:0] = [0,x,0]
MODE[2:0] = [0,x,Open]
MODE[2:0] = [Open,x,0]
MODE[2:0] = [Open,x,Open]
VCORE (STARTUP)
Maximum Output Current
TJ = 0°C to 105°C, VLINB+ ≤ VCORE(NOM) + 0.8 V (Note 9)
IVCORE
Notes
7. 12 V ≤ VB+ ≤ 32 V and -20°C ≤ TJ ≤ 145°C unless otherwise noted.
8. Refer to Table 1, page 10.
9. Pulse testing with low duty cycle used.
Max
3.6
2.7
2.0
1.65
500
Unit
V
mA
MOTOROLA ANALOG INTEGRATED CIRFCoUrITMDoErVeICEInDfAoTrAmation On This Product,
Go to: www.freescale.com
34710
5
5 Page 
Freescale Semiconductor, Inc.
Vb Charge Pump
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.
Internal Oscillator
The internal oscillator provides timing for the charge pump
and switching regulators.
APPLICATIONS
Power Dissipation
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 CIRFCoUrITMDoErVeICEInDfAoTrAmation On This Product,
Go to: www.freescale.com
34710
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MC34710.PDF ] | |
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