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Freescale Semiconductor Electronic Components Datasheet

33394 Datasheet

Switch Mode Power Supply

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Freescale Semiconductor,OIrdnercth.is document from Analog Marketing
Rev. 2.5, 11/2002
Switch Mode Power Supply with
Multiple Linear Regulators and
High Speed CAN Transceiver
The 33394 is a multi–output power supply integrated circuit with high
speed CAN transceiver. The IC incorporates a switching pre–regulator
operating over a wide input voltage range from +4.0V to +26.5V (with
transients up to 45V).
The switching regulator has an internal 3.0A current limit and runs in both
buck mode or boost mode to always supply a pre–regulated output followed
by Low Drop Out (LDO) regulators: VDDH / 5.0V @ 400mA; VDD3_3 / 3.3V
@ 120mA; VDDL / 2.6V (User scalable between 3.3V – 1.25V) @ 400mA
typically, using an external NPN pass transistor. The Keep Alive regulator
VKAM (scalable) @ 50mA; FLASH memory programming voltage VPP /
5.0V or 3.3V @ 150mA; three sensor supply outputs VREF(1,2,3) / 5.0V
(tracking VDDH) @ 100mA each; and a switched battery output (VSEN) to
supply 125mA clamped to 17V.
Additional features include Active Reset circuitry watching VDDH,
VDD3_3, VDDL and VKAM, user selectable Hardware Reset Timer (HRT),
Power Sequencing circuitry guarantees the core supply voltages never
exceed their limits or polarities during system power up and power down.
A high speed CAN transceiver physical layer interfaces between the
microcontroller CMOS outputs and differential bus lines. The CAN driver is
short circuit protected and tolerant of loss of battery or ground conditions.
33394 is designed specifically to meet the needs of modules, which use
the MPC565 microcontroller, though it will also support others from the
MPC5XX family of Motorola microcontrollers.
Features:
Wide operating input voltage range: +4.0V to +26.5V (+45V transient).
Provides all regulated voltages for MPC5XX MCUs and other ECU’s
logic and analog functions.
Accurate power up/down sequencing.
Provides necessary MCU support monitoring and fail–safe support.
Provides three 5.0 V buffer supplies for internal & external (short–circuit
protected) sensors.
Includes step–down/step–up switching regulator to provide supply
voltages during different battery conditions.
Interfaces Directly to Standard 5.0V I/O for CMOS Microprocessors by
means of Serial Peripheral Interface.
PIN CONNECTIONS
GND
SW2G
BOOT
SW1
SW1
SW1
VBAT
VBAT
KA_VBAT
VIGN
VKAM
1
QFN
TOP VIEW
VBAT
VBAT
KA_VBAT
VIGN
/SLEEP
HRT
CANH
CANL
GND
CANTXD
CANRXD
/PORESET
/HRESET
/PRERESET
VDDL_FB
VKAM
VKAM_FB
VSEN
REGON
WAKEUP
VREF1
VPP_EN
VPP
VDD3_3
VDD3_3FB
VDDL_X
VDDL_B
VDDL_FB
/PRERESET
/HRESET
/PORESET
CANRXD
CANTXD
1
HSOP
SW1
SW1
SW1
BOOT
SW2G
GND
INV
VCOMP
VPRE
VPRE_S
VDDH
VREF2
VREF3
DO
SCLK
DI
CS
/SLEEP
HRT
CANH
CANL
GND
33394
MULTI–OUTPUT
POWER SUPPLY
SEMICONDUCTOR
TECHNICAL DATA
44–Lead HSOP
DH SUFFIX
CASE 1291
44–Lead QFN
FC SUFFIX
CASE 1310
(BOTTOM VIEW)
54–Lead SOICW–EP
DWB SUFFIX
CASE 1377
PIN CONNECTIONS
GND
CANL
CANH
HRT
/SLEEP
N/C
CS
DI
SCLK
DO
N/C
VREF3
VREF2
VDDH
VPRE_S
VPRE
VCOMP
INV
GND
SW2G
BOOT
N/C
SW1
SW1
SW1
SW1
SW1
1
SOICW
CANTXD
CANRXD
/PORESET
/HRESET
/PRERESET
N/C
VDDL_FB
VDDL_B
VDDL_X
VDD3_3FB
VDD3_3
VPP
VPP_EN
VREF1
WAKEUP
REGON
VSEN
VKAM_FB
VKAM
VIGN
N/C
KA_VBAT
VBAT
VBAT
VBAT
VBAT
VBAT
This document contains information on a new product. Specifications
and information herein are subject to change without notice.
© Motorola, Inc. 2002
MOTOROLA ANALOG
For More Information On This Product,
INTEGRATED CIRCUGIToDtEoV:ICwEwDwAT.fAreescale.com
1


Freescale Semiconductor Electronic Components Datasheet

33394 Datasheet

Switch Mode Power Supply

No Preview Available !

Freescale Se3m33ic94onductor, Inc.
To Q3 Figure 1. 33394DH – Simplified Block Diagram and Typical Application
Lf1
Dp1
6.8 mH
VBAT
SW1
L1
47 mH
VPRE
D2 5.6 V
+ Dp2
ON
Control
OFF
+
Cf1
10 mF
+ 1, 2
Cf2
100 mF
KA_VBAT
3
4.7 k VIGN
10 nF
4
2.6 V
10 nF
+
22 mF
VKAM
22 k 5
VKAM_FB
6
20 k
VSEN
7
REGON
Oscillator
VKAM
Keep–Alive
Adj. Volt.
60 mA
I–Lim
VSEN
VBAT Volt.
125 mA
T–Lim, I–Lim
Feed
Forward
Ramp
Generator
+
42–44
Cb
100 nF
+
C1
100 mF
Buck
Control
Logic
Boost
+
High–Side
Drive
Low–Side
Drive
BOOT
41
D1
SW2G Q1
40
GND
39
MTD20N03HDL
Cc3
40 k
INV
3.3 nF
+
Vbg
38
11.7 k 100 pF
Cc1
Rc2
100 k
Rc3
430R
VCOMP 1.0 nF Cc2
37 VPRE
36 VPRE_S
35
8
WAKEUP
CANRXD
Enable
9 Sleep
5.0 V
10 nF
VREF1
+ 10
1.0 mF
VREF1
5.0 V
100 mA
LDO
T–Lim, I–Lim
CAN
Wakeup
Logic
Vbg
VDDH
5.0 V
400 mA
LDO
T–Lim, I–Lim
VDDH
34 +
47 mF
5.0 V
10 nF
VPP_EN
5.0 V/3.3 V VPP11
+ 12
10 nF
47 mF
VPP
5.0 V/3.3 V
150 mA
LDO
T–Lim, I–Lim
Band Gap
Reference
VREF2
5.0 V
100 mA
LDO
T–Lim, I–Lim
VREF2
33 +
1.0 mF
5.0 V
10 nF
VDD3_3
VDD3_3
VREF3
3.3 V
+
10 nF 47 mF VPRE
Q2
MJD31C
VDDL
2.6 V
13
VDD3_FB
14
VQ3
Q3
MJD31C
15
16
17
3.3 V
120 mA
LDO, Pass
T–Lim, I–Lim
VDDL_B VDDL Drive
VDDL_X
Adj. Volt.
40 mA
VDDL_FB Dual Pass
T–Lim
Standby
Control
5.0 V
100 mA
LDO
T–Lim, I–Lim
16 Bit
SPI
Control
Fault Rep.
VREF3
32 +
1.0 mF
5.0 V
10 nF
DO
31 SCLK
30
DI
29
CS
28
10 nF
+
47 mF
110R
/PRERESET 18
/HRESET 19
100R
/PORESET
20
VKAM
2.6 V
10 k 10 k
10 k
Reset
Detection
VDDH,
VDD3_3,
VDDL
High–Speed CAN
Transceiver
Sleep
POR Timer
21
CANRXD
22 23
CANTXD
GND
24 25
CANL CANH
120 R
VDDH
/SLEEP 5.0 V
27
HRT 47 k
26
1.0 mF
Notes: 1. In this configuration the device can operate with a minimum input voltage VBAT of 4.0 V (voltage at 33394 VBAT pins).
Notes: 2.VDDL and VKAM are adjustable to support current microprocessor technology (1.25 V to 3.3 V) by means of an external resistor divider.
Notes: 3. When the 33394 CAN transceiver is not used, CANL and CANH pins can be shorted together.
Notes: 4. Dp1 = reverse battery protection diode. Dp2 = load dump protection diode. Dp1, Dp2 can be ommitted in those applications which do not require such protection.
For More Information On This Product,
2 Go to: wwwMO.fTrOeeRsOcLAalAeN.cAoLmOG INTEGRATED CIRCUIT DEVICE DATA


Part Number 33394
Description Switch Mode Power Supply
Maker Freescale Semiconductor
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33394 Datasheet PDF





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