TPS7B69-Q1: load transient and line transient compare with LM2937-5.0

Hi Jason,

TPS7B6950QDCYRQ1 vs LM2937IMP-5.0/NOPB and Cin : 22uF/50V ; Cout : 10uF/10V

Requirements from the customer on the line and load as below

1. 6-40V @5V 150mA
2. 6-40V @5V 40mA
3. 10-150mA @Vin 18 / Vout 5V

B/R James

Hi James,

Thanks for providing the updated conditions. I have ordered the TPS7B69 EVM with the 5.0 device; however, LM2937 has no EVM and we would need to find a board to solder the parts and it would require addtional time. I have placed order for the units only. It normally takes 2-3 business days for the order to arrive. The best estiamte for us to complete the data is by 7/5/2019. 

I asked for the requirements from the customer, I was meant to ask on customer's output voltage tolerance from the tests; for example, what's the highest overshot or undershot allowed in customer's application? Or if the overshot and undershot exceed certain voltage, customer will not consider the devices. This information is extremly important because even we don't have data for the exact condition on datasheet, we may estimate how the device would perform before we take the actual data. instead of letting customer wait for days even weeks for the measurement to finish, It wil also allow us to recommend alternative devices to the customer if we have better device recommendation.

For the conditions you have provided, due to the limitation of the power amplification board, we may not be able to go 40V; the highest we can get is probably 30V, will that be a problem for customers? Will you also provide the slew rate of the input voltage and load current that are applied on the devices?

Regards,
Jason Song

Hi Jason,

In fact, LM2937-5.0 has been used in customer products for a long time. Due to the recent bad situation of Japanese customers, the customer has learned a serious problem and must change the program. Therefore, it is considered to be replaced with the new TPS7B69- The Q1 series, but the product PCN must obtain the consent of the Japanese customer, so this demand will be raised.
Customers can accept Vout 4.75V~5.25V.
Currently selected is TPS7B69-Q1. If RSL ~0.12 is suitable for parts, it can be recommended, but TPS7B69-Q1 is preferred.
The product is a power tool, and the rotation will cause Vcc drop. When the bet is turned, the BMEF will be backflowed to VCC, and the transient response must be at least 36V.
I can't provide slew rate of the input voltage and load current .

B/R James

Hi James,

Just wanted to touch base and let you know that transient line and load responses measurements will be sent by 7/5/2019. 

BR,

Haidar