We using TPS62090 DCDC to step-dow the Input from SMPS (5.0-5.6V 2A) to 3.2V.
We pull up the Freq by 390k ohm to make TPS62090 operate in 1.4MHz mode. EN pin is connected to Vin directly.
In SMPS spec. , Vout max(no load) is 5.6V, and Vout max(2A load) is 5.5V.
In TPS62090 recommended operating conditions, the Input Voltage is 2.5-6V.
This means we have at least 0.4V margin between SMPS and DCDC.
Due to Long LT, we searching Alt. parts.
TLV62090RGTR,TPS62095RGTR and TLV62095RGTR are pin-to-pin and have similar features but the Vin is 2.5-5.5V.
Is it ok to use these parts as Alt. of TPS62090RGTR?
PARAMETERS |
PROVIDED MPN |
|
|
|
MFR PART NUMBER |
TPS62090RGTR |
TLV62090RGTR |
TPS62095RGTR |
TLV62095RGTR |
TYPE |
adj. 3A Step-Down Converter |
adj. 3A Step-Down Converter |
adj. 4A Step-Down Converter |
adj. 4A Step-Down Converter |
Absolute Maximum Voltage |
7V |
7V |
7V |
7V |
Vin |
2.5-6V |
2.5-5.5V |
2.5-5.5V |
2.5-5.5V |
Switching frequency |
1.4/2.8Mhz |
1.4Mhz |
1.4Mhz |
1.4Mhz |
EN pin |
pull down resistor of typically 400kΩ |
pull down resistor of typically 400kΩ |
pull down resistor of typically 400kΩ |
pull-down resistor of 400 kΩ when the EN pin is low. |
Casing |
QFN16 |
QFN16 |
QFN16 |
QFN16 |
ROHS |
Yes |
Yes |
Yes |
Yes |