PM6680ATR STMicroelectronics, PM6680ATR Datasheet - Page 39
PM6680ATR
Manufacturer Part Number
PM6680ATR
Description
IC CTRLR DUAL STEP DOWN 32VFQFPN
Manufacturer
STMicroelectronics
Datasheet
1.PM6680ATR.pdf
(48 pages)
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
PM6680ATR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PM6680ATR
Manufacturer:
STMicroelectronics
Quantity:
10 000
PM6680A
9.7
Other parts design
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Figure 38. VIN pin filter
Typical components values are: R = 3.9 Ω and C = 4.7 µF.
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Figure 39. Inductor current waveforms
Typical components values are: R = 47 Ω and C = 1µF.
●
●
●
VIN filter
A VIN pin low pass filter is suggested to reduce switching noise. The low pass filter is
shown in the next figure:
VCC filter
A VCC low pass filter helps to reject switching commutations noise:
VREF capacitor
A 10nF to 100nF ceramic capacitor on VREF pin must be added to ensure noise
rejection.
LDO5 output capacitors
Bypass the output of each linear regulator with 1 µF ceramic capacitor closer to the
LDO pin and a 4.7µF tantalum capacitor (ESR = 2 Ω). In most applicative conditions a
4.7 µF ceramic output capacitor can be enough to ensure stability.
Bootstrap circuit
The external bootstrap circuit is represented in the next figure:
Input
voltage
R
R
C
C
R
R
C
C
1
1
0
0
0
0
p
p
F
F
L
V
L
V
V
V
D
D
C
C
I
I
N
N
O
O
C
C
5
5
Design guidelines
39/48