EVALPM6680A STMicroelectronics, EVALPM6680A Datasheet - Page 41

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EVALPM6680A

Manufacturer Part Number
EVALPM6680A
Description
EVAL BOARD FOR PM6680A
Manufacturer
STMicroelectronics
Datasheet

Specifications of EVALPM6680A

Mfg Application Notes
PM6680A, AN2565 Appl Note
Main Purpose
DC/DC, Step Down with LDO
Outputs And Type
3, Non-Isolated
Power - Output
10.5W
Voltage - Output
1.8V, 3.3V, 5V
Current - Output
2.5A, 2.5A, 100mA
Voltage - Input
6 ~ 36V
Regulator Topology
Buck
Frequency - Switching
200kHz, 300kHz
Board Type
Fully Populated
Utilized Ic / Part
PM6680A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6263

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PM6680A
Equation 37
We choose standard value L=4.7 µH.
∆I
I
I
2.
3.
4.
Equation 38
Equation 39
Equation 40
LRMS
peak
L(max)
Output capacitor selection
We would like to have an output ripple smaller than 25 mV.
OUT1: POSCAP 4TPE150MI
OUT2: POSCAP 6TPE220M
Power MOSFETs
OUT1:High side: STS5NF60L
Low side: STS7NF60L
OUT2:High side: STS5NF60L
Low side: STS7NF60L
Current limit
OUT1:
(Let's assume the maximum temperature Tmax = 75 °C in R
choose standard value R
OUT2:
= 2.5 A + 0.58 A = 3.83 A
= 2.523 A
= 0.886 A @VIN =24 V.
CSENSE
= 560 Ω.
DSon
calculation). We
A
Design guidelines
41/48

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