PM6680ATR STMicroelectronics, PM6680ATR Datasheet - Page 41

• Manufacturer Part Number: PM6680ATR
• Description: IC CTRLR DUAL STEP DOWN 32VFQFPN
• Manufacturer: STMicroelectronics

Specifications of PM6680ATR

• Applications: Controller, Embedded Computer System
• Voltage - Input: 6 ~ 36 V
• Number Of Outputs: 2
• Voltage - Output: 0.9 ~ 5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN, 32-VFQFPN
• For Use With: 497-6379 - BOARD EVALUATION FOR PM6680A497-6378 - BOARD EVALUATION FOR PM6680497-6425 - BOARD EVAL BASED ON PM6680A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6896-2; PM6680ATR

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
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