A6902D Up to 2.5 A step down switching regulator for automotive applications
The A6902D is a complete and simple step down switching regulator with adjustable current limit. Based on a voltage mode structure it integrates a current error amplifier to have a constant voltage and constant current control. By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate. Moreover constant current control can be used to charge NiMH and NiCd batteries.The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor). The internal robust P-channel DMOS transistor with a typical of 250 mΩ assures high efficiency and a minimum dropout even at high output current level. The internal limiting current (latched function) of typical value of 2.5 A protects the device from accidental output short circuit avoiding dangerous loads damage. If the temperature of the chip goes higher than a fixed internal threshold (150 °C with 20 °C hysteresis), the power stage is turned off.
Other protections beside thermal shutdown complete the device for a safe and reliable application: overvoltage protection, frequency folback overcurrent protection and protection vs. feedback disconnection. The internal fixed switching frequency of 250 kHz, and the SO-8 package pin allow to built an ultra compact DC/DC converter with a minimum board space.
技术特性
- Qualified following the AEC-Q100 requirements (see PPAP for more details)
- Up to 1 A DC output current
- Operating input voltage from 8 V to 36 V
- Output voltage adjustable from 1.235 V to 35 V
- Precise 3.3 V (±2 %) reference voltage
- 250 kHz Internally fixed frequency
- Voltage feedforward
- Zero-load current operation
- Internal current limiting
- Protection against feedback disconnection
- Thermal shutdown
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应用领域
- Automotive applications
- Adjustable current generator
- Simple step-down converters with adjustable
current limit
管脚定义图
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A6902D 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| A6902D13TR |
Active |
|
1000 |
SO-8 |
Tape And Reel |
|
|
| A6902D |
Active |
|
1000 |
SO-8 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| A6902D : Up to 1 A step down switching regulator with adjustable current limit for automotive applications |
5 |
254KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN3288: g-Brake Lights: an adaptive rear lighting system based on the AIS326DQ inertial sensor and the STM8AF5168 MCU |
2 |
1074KB |
FLYERS
| 描述 |
版本 |
大小 |
| FLA597X0111: Up to 3 A switching step-down regulators |
1.0 |
740KB |
