Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC34710
Rev 1.0, 04/2004
Preliminary Information
Adjustable Dual Output Switching
Power Supply
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.
34710
ADJUSTABLE DUAL OUTPUT
SWITCHING POWER SUPPLY
Freescale Semiconductor, Inc...
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
PC34710EW/R2
Temperature
Range (T
A
)
0°C to 85°C
Package
32 SOICW-EP
Simplified Application Diagram
34710 Simplified Application Diagram
12 V to 32 V
B+
Vb
CP2
CP1
Mode0
Mode1
Mode2
LINB+
RST
GND
V
CORE
V
CORE
V
SWITCH
V
I/O_OUT
MCU
V
I/O
34710
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola, Inc. 2004
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B+
2000 Hz
Oscillator
Charge
Pump
CP1
CP2
V
b
Supervisory and
Temperature
Shutdown
RST
C
t
Freescale Semiconductor, Inc...
Bandgap
V
I/O
Switching
Regulator
V
CORE
Linear
Regulator
V
I/O_OUT
V
SWITCH
MODE0
MODE1
MODE2
LINB+
V
CORE
(2)
GND
Figure 1. 34710 Simplified Internal Block Diagram
34710
2
MOTOROLA ANALOG 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
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
C
t
CP1
CP2
V
b
B+
V
SWITCH
V
I/O_OUT
LINB+
V
CORE
V
CORE
NC
NC
NC
NC
NC
NC
TERMINAL FUNCTION DESCRIPTION
Terminal
1
2
3
4
5–12,
14–22
13
23, 24
25
26
27
28
29
30
31
32
Terminal
Name
RST
Formal Name
Reset
Mode Control
Definition
Reset input and output. This terminal is open drain.
These input terminals control V
I/O_OUT
and V
CORE
output voltages.
MODE0
MODE1
MODE2
NC
GND
V
CORE
LINB+
V
I/O_OUT
V
SWITCH
B+
V
b
CP2
CP1
C
t
No Connects
Ground
Core Voltage Regulator
Output
Core Voltage Regulator
Input
V
I/O
Switching Regulator
Feedback
V
I/O
Switching Regulator
Switch Output
Power Supply Input
Boost Voltage
Switching Capacitor 2
Switching Capacitor 1
Reset Delay Capacitor
No internal connection to this terminal.
Ground.
Core regulator output voltage.
Core regulator input voltage.
Feedback terminal for V
I/O
switching regulator and internal logic supply.
V
I/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 CIRCUIT DEVICE DATA
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3
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MAXIMUM RATINGS
All voltages are with respect to ground unless otherwise noted.
Rating
Symbol
Max
Unit
GLOBAL ABSOLUTE MAXIMUM RATINGS
Input Power Supply Voltage
I
B
+
= 0 A
Terminal Soldering Temperature (Note 1)
Power Dissipation (Note 2)
ESD Standoff Voltage
Non-Operating, Unbiased, Human Body Model (Note 3)
Thermal Resistance
V
ESD1
R
θ
JA
R
θ
JA
R
θ
JC
±2000
°C/W
45
25
2.0
T
SOLDER
P
D
V
B
+
-0.3 to 36
260
3.0
°C
W
V
V
Freescale Semiconductor, Inc...
Junction-to-Ambient (Note 4)
Junction-to-Ambient (Note 2)
Junction-to-Case
GLOBAL OPERATING RATINGS
Operating Ambient Temperature
Operating Device Junction Temperature
Input Power Supply Voltage
I
B
+
= 0 A to 3.0 A
Quiescent Bias Current from B+ (Note 5)
V
B
+
= 12 V to 32 V
Operating Junction Temperature
T
J
I
B+
(
q
)
7.5
-0 to 105
°C
T
A
T
J
V
B
+
12 to 32
mA
0 to 85
105
°C
°C
V
V
I/O
SWITCHING REGULATOR
(Note 6)
Maximum Output Voltage Startup Overshoot (C
OUT
= 330
µF)
MODE0 = 0
MODE0 = Open
Maximum Output Current
T
A
= 0°C to 105°C
I
VI/O
1.2
V
I/O
(
STARTUP
)
5.4
3.6
A
V
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.
4.
5.
6.
With 2.0 in
2
of copper headsink.
ESD1 testing is performed in accordance with the Human Body Model (C
ZAP
= 100 pF, R
ZAP
= 1500
Ω).
With no additional heatsinking.
Maximum quiescent power dissipation is 0.25 W.
12 V
≤
V
B+
≤
32 V and -20°C
≤
T
J
≤
145°C unless otherwise noted
.
34710
4
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
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MAXIMUM RATINGS (continued)
All voltages are with respect to ground unless otherwise noted.
Rating
Symbol
Max
Unit
V
CORE
LINEAR REGULATOR
(Note 7)
Maximum Output Voltage Startup Overshoot (C
OUT
= 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]
Maximum Output Current
T
J
= 0°C to 105°C, V
LINB
+
≤
V
CORE
(NOM) + 0.8 V (Note 9)
I
VCORE
500
V
CORE
(
STARTUP
)
3.6
2.7
2.0
1.65
mA
V
Freescale Semiconductor, Inc...
Notes
7. 12 V
≤
V
B+
≤
32 V and -20°C
≤
T
J
≤
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
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34710
5
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