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TLE8366E V50 英飞凌芯片 INFINEON 中文版规格书手册.pdf
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TLE8366E V50 英飞凌芯片 INFINEON 中文版规格书手册
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Automotive Power
Data sheet
Rev. 1.0, 2009-05-18
TLE8366
1.8A DC/DC Step-Down Voltage Regulator
TLE8366EV50
TLE8366EV
TLE8366EV33
![](https://csdnimg.cn/release/download_crawler_static/88026918/bg2.jpg)
PG-DSO-8
Type Package Marking
TLE8366EV50 PG-DSO-8 8366EV50
TLE8366EV33 PG-DSO-8 8366EV33
TLE8366EV PG-DSO-8 8366EV
Data sheet 2 Rev. 1.0, 2009-05-18
1.8A DC/DC Step-Down Voltage Regulator TLE8366
1Overview
• 1.8A step down voltage regulator
• Output voltage versions: 5.0 V, 3.3 V and adjustable
• ± 2% output voltage tolerance (+-4% for full load current range)
• Integrated power transistor
• PWM regulation with feedforward
• Input voltage range from 4.75V to 45V
• 370 kHz switching frequency
• Synchronization input
• Very low shutdown current consumption (<2uA)
• Soft-start function
• Input undervoltage lockout
• Suited for automotive applications:
T
j
= -40 °C to +150 °C
• Green Product (RoHS compliant)
• AEC Qualified
Description
The TLE8366 is a PWM step-down DC/DC converter with an integrated 1.8 A power switch, packaged in a small
PG-DSO-8 with exposed pad. There are three versions available, two fixed voltage with 5.0 V (TLE8366EV50) or
3.3 V (TLE8366EV33) and a variable voltage variant named TLE8366EV with a reference feedback voltage of only
600 mV. The wide input voltage range from 4.75 to 45 V makes the TLE8366 suitable for a wide variety of
applications. The device is designed to be used under harsh automotive environment.
The switching frequency of nominal 370 kHz allows the use of small and cost-effective inductors and capacitors,
resulting in a low, predictable output ripple and in minimized consumption of board space. (If desired the device
could be synchronized to an external frequency source between 200 and 530 kHz.)
The TLE8366 includes safety features such as a cycle-by-cycle current limitation, over-temperature shutdown and
input under voltage lockout. The enable function, in shutdown mode with less than 2 µA current consumption,
enables easy power management in battery-powered systems.
The voltage regulation loop provides an excellent line and load regulation. The stability of the loop could be
adjusted by using an external compensation network. This compensation network combined with voltage mode
regulation and a feed-forward control path guarantees a highly effective line transient rejection. During start-up the
integrated soft-start limits the inrush current peak and prevents from a voltage overshoot.
![](https://csdnimg.cn/release/download_crawler_static/88026918/bg3.jpg)
TLE8366
Block Diagram
Data sheet 3 Rev. 1.0, 2009-05-18
2 Block Diagram
Figure 1 Block Diagram
8
2
GND
Enable
Oscillator
7
4
Buck
Converter
6
FB
BUO
3
COMP
TLE8366
1
SYNC
5
BDS
EN VS
Over
Temperature
Shutdown
Feedforward
Soft start ramp
generator
Bandgap
Reference
Charge Pump
![](https://csdnimg.cn/release/download_crawler_static/88026918/bg4.jpg)
Data sheet 4 Rev. 1.0, 2009-05-18
TLE8366
Pin Configuration
3 Pin Configuration
3.1 Pin Assignment
Figure 2 Pin Configuration
3.2 Pin Definitions and Functions
Pin Symbol Function
1SYNCSynchronization Input.
Connect to an external clock signal in order to synchronize/adjust the switching frequency.
If not used connect to GND.
2GNDGround.
3
COMP
Compensation Input.
Frequency compensation for regulation loop stability.
Connect to compensation RC-network.
4FB Feedback Input.
For the adjustable output voltage versions (TLE8366EV) connect via voltage divider to output
capacitor.
For the fixed voltage version (TLE8366EV50, TLE8366EV33) connect this pin directly to the
output capacitor.
5BDS Buck Driver Supply Input.
Connect the bootstrap capacitor between this pin and pin BUO.
6BUO Buck Switch Output.
Source of the integrated power-DMOS transistor. Connect directly to the cathode of the catch
diode and the buck circuit inductance.
7EN Enable Input.
Active-high enable input with integrated pull down resistor.
8VS Supply Voltage Input.
Connect to supply voltage source.
Exposed Pad Connect to heatsink area and GND by low inductance wiring.
GND EN
COMP BUO
VS
5
6
4
3
2 7
1 8
FB
TLE8366
SYNC
BDS
S08_PIN. vsd
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