Multi-Voltage Processor Power Supply
TLE 6368 / SONIC
1
1.1
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Overview
Features
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High efficiency regulator system
Wide input voltage range from 5.5V to 60V
Stand-by mode with low current consumption
Suitable for standard 12V/24V and 42V PowerNets
Step down converter as pre-regulator:
5.5V / 1.5A
Step down slope control for lowest EME
Switching loss minimization
Three high current linear post-regulators with
selectable output voltages:
5V / 800mA
3.3V or 2.6V / 500mA
3.3V or 2.6V / 350mA
Six independent voltage trackers (followers):
5V / 17mA each
Stand-by regulator with 1mA current capability
Three independent undervoltage detection circuits
(e.g. reset, early warning) for each linear post-regulator
Power on reset functionality
Tracker control and diagnosis by SPI
All outputs protected against short-circuit
Power PG-DSO-36-26 package
Green (RoHS compliant) version of TLE 6368 G1
AEC qualified
PG-DSO-36-26
Type
TLE 6368 G1 / SONIC
SMD = Surface Mounted Device
Package
PG-DSO-36-26 (RoHS compliant)
Data Sheet
1
Rev. 2.2, 2006-12-01
TLE 6368 / SONIC
1.2
Short functional description
The
TLE 6368 G1 / SONIC
is a multi voltage power supply system especially designed
for automotive applications using a standard 12V / 24V battery as well as the new 42V
powernet. The device is intended to supply 32 bit micro-controller systems which require
different supply voltage rails such as 5V, 3.3V and 2.6V. The regulators for external
sensors are also provided.
The
TLE 6368 G1 / SONIC
cascades a Buck converter block with a linear regulator and
tracker block on a single chip to achieve lowest power dissipation thus being able to
power the application even at very high ambient temperatures.
The step-down converter delivers a pre-regulated voltage of 5.5V with a minimum
current capability of 1.5A.
Supplied by this step down converter three low drop linear post-regulators offer 5V, 3.3V,
or 2.6V of output voltages depending on the configuration of the device with current
capabilities of 800mA, 500mA and 350mA.
In addition the inputs of six voltage trackers are connected to the 5.5V bus voltage. Their
outputs follow the main 5V linear regulator (Q_LDO1) with high accuracy and are able to
drive a current of 17mA each. The trackers can be turned on and off individually by a 16
bit serial peripheral interface (SPI). Through this interface also the status information of
each tracker (i.e. short circuit) can be read out.
To monitor the output voltage levels of each of the linear regulators three independent
undervoltage detection circuits are available which can be used to implement the reset
or an early warning function. The supervision of the µC can be managed by the SPI-
triggered window watchdog.
For energy saving reasons while the motor is turned off, the
TLE 6368 G1 / SONIC
offers
a stand-by mode, where the quiescent current does not exceed 30µA. In this stand-by
mode just the stand-by regulator remains active.
The
TLE 6368 G1 / SONIC
is based on Infineon Power technology SPT
which allows
bipolar , CMOS and Power DMOS circuitry to be integrated on the same monolithic
circuitry.
Data Sheet
2
Rev. 2.2, 2006-12-01
TLE 6368 / SONIC
1.3
Pin configuration
PG-DSO-36-
GND
C LK
CS
DI
DO
ERR
Q _STB
Q _T1
Q _T2
Q _T3
Q _T4
Q _T5
Q _T6
Q _LDO 3
R3
R2
R1
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
GND
SLEW
W AKE
BOOST
IN
SW
IN
SW
B o o tstra p
Q _LD O 1
F B /L _ IN
F B /L _ IN
Q _LD O 2
SEL
CCP
C+
C-
GND
TLE 6368
Figure 1 Pin Configuration (Top View),
bottom heat slug and GND corner pins are connected
Data Sheet
3
Rev. 2.2, 2006-12-01
TLE 6368 / SONIC
1.4
Pin No.
1,18,19,
36
2
Pin definitions and functions
Symbol
GND
Function
Ground;
to reduce thermal resistance place cooling areas on
PCB close to these pins. The GND pins are connected internally
to the heat slug at the bottom.
SPI Interface Clock input;
clocks the shift register; CLK has an
internal active pull down and requires CMOS logic level
inputs;see also chapter SPI
SPI Interface chip select input;
CS is an active low input; serial
communication is enabled by pulling the CS terminal low; CS
input should only be switched when CLK is low; CS has an
internal active pull up and requires CMOS logic level inputs ;see
also chapter SPI
SPI Interface Data input;
receives serial data from the control
device; serial data transmitted to DI is a 16 bit control word with
the Least Significant Bit (LSB) being transferred first; the input
has an active pull down and requires CMOS logic level inputs; DI
will accept data on the falling edge of CLK-signal; see also
chapter SPI
SPI Interface Data output;
this tristate output transfers
diagnosis data to the controlling device; the output will remain 3-
stated unless the device is selected by a low on Chip-Select CS;
see also the chapter SPI
Error output;
push-pull output. Monitors failures in parallel to the
SPI diagnosis word, reset via SPI. ERR is an active low, latched
output.
Standby Regulator Output;
the output is active even when the
buck regulator and all other circuitry is in off mode
Voltage
Tracker Output T1
tracked to Q_LDO1; bypass with a
1µF ceramic capacitor for stability. It is switched on and off by
SPI command. Keep open, if not needed.
Voltage
Tracker Output T2
tracked to Q_LDO1; bypass with a
1µF ceramic capacitor for stability. It is switched on and off by
SPI command. Keep open, if not needed.
Voltage
Tracker Output T3
tracked to Q_LDO1; bypass with a
1µF ceramic capacitor for stability. It is switched on and off by
SPI command. Keep open, if not needed.
4
Rev. 2.2, 2006-12-01
CLK
3
CS
4
DI
5
DO
6
ERR
7
8
Q_STB
Q_T1
9
Q_T2
10
Q_T3
Data Sheet
TLE 6368 / SONIC
1.4
Pin No.
11
Pin definitions and functions
(cont’d)
Symbol
Q_T4
Function
Voltage
Tracker Output T4
tracked to Q_LDO1; bypass with a
1µF ceramic capacitor for stability. It is switched on and off by
SPI command. Keep open, if not needed.
Voltage
Tracker Output T5
tracked to Q_LDO1; bypass with a
1µF ceramic capacitor for stability. It is switched on and off by
SPI command. Keep open, if not needed.
Voltage
Tracker Output T6
tracked to Q_LDO1; bypass with a
1µF ceramic capacitor for stability. It is switched on and off by
SPI command. Keep open, if not needed.
Voltage Regulator
Output 3; 3.3V or 2.6V output;
output
voltage is selected by pin SEL (see also 2.2.2); For stability a
ceramic capacitor of 470nF to GND is sufficient.
Reset output 3,
undervoltage detection for output Q_LDO3;
open drain output; an external pullup resistor of 10kΩ is
required
Reset output 2,
undervoltage detection for output Q_LDO2;
open drain output; an external pullup resistor of 10kΩ is
required
Reset output 1,
undervoltage detection for output Q_LDO1 and
watchdog failure reset; open drain output ; an external pullup
resistor of 10kΩ is required
Charge pump capacitor connection;
Add the fly-capacitor of
100nF between C+ and C-
Charge pump capacitor connection;
Add the fly-capacitor of
100nF between C+ and C-
Charge Pump Storage Capacitor Output;
Add the storage
capacitor of 220nF between pin CCP and GND.
Select Pin
for output voltage adjust of Q_LDO2 and Q_LDO3
(see also 2.2.2)
Voltage Regulator
Output 2; 3.3V or 2.6V output;
output
voltage is selected by pin SEL (see also 2.2.2); For stability a
ceramic capacitor of 470nF to GND is sufficient.
Feedback and Linear Regulator Input;
input connection for
the Buck converter output
12
Q_T5
13
Q_T6
14
Q_LDO3
15
R3
16
R2
17
R1
20
21
22
23
24
C-
C+
CCP
SEL
Q_LDO2
25, 26
FB/L_IN
Data Sheet
5
Rev. 2.2, 2006-12-01
