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ADP1876ACPZ-R7 Datenblatt(PDF) 23 Page - Analog Devices

Teilenummer ADP1876ACPZ-R7
Bauteilbeschribung  600 kHz Dual Output Synchronous Buck
PDF  24 Pages
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ADP1876ACPZ-R7 Datenblatt(HTML) 23 Page - Analog Devices

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Data Sheet
ADP1876
Rev. A | Page 23 of 24
A resistor, shown as RRISE in Figure 32 at the BST1 pin, helps to
reduce overshoot and is generally between 2 Ω and 4 Ω. Adding
a resistor in series, typically between 2 Ω and 4 Ω, with the gate
driver also helps to reduce overshoot. If a gate resistor is added,
RRISE is not needed.
Figure 32. Application Circuit with a Snubber
PCB LAYOUT GUIDELINE
For additional information about PCB layout, see the AN-1119
Application Note, Printed Circuit Board Layout Guidelines for
Step-Down Regulators, Optimizing for Low Noise Design with
Dual Channel Switching Controllers.
TYPICAL APPLICATIONS CIRCUIT
Figure 33. Typical Applications Circuit
VIN
ADP1876
(CHANNEL 1)
DH1
VDL
DL1
ILIM1
RILIM1
SW1
BST1
PGND1
RRISE
M1
M2
L
VOUT
CSNUB
COUTx
RSNUB
750kΩ
EN1
VIN
100nF
TO
VIN
VINLDO
VOUTLDO
VCCO
VDL
AGND
NC
SW1
DH1
PGND1
DL1
DL2
PGND2
DH2
SW2
ADP1876
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
9
10
11
12
13
14
15
16
INPUT
3V TO 5.5V
12.4kΩ
10pF
120pF
44.2kΩ
22pF
330pF
100nF
0.1µF
0.1µF
1µF
4.7µF
1µF
2.1k
Ω
L2
M4
M3
COUT22
CIN2
VOUT2
1.8V@
13A
VIN
2.1k
Ω
L1
M2
M1
22k
Ω
COUT12
COUT21
22kΩ
COUT11
CIN1
CIN
VOUT1
5V@
13A
VIN = 10V TO 14V
20kΩ
AGND
PGND
10kΩ
CIN1, CIN2: 10µF/X7R/25V/1210 × 2, GRM32DR71E106KA12, MUR ATA
COUT11, COUT21: 330µF/6.3V/POSCAP × 2, 6TPF330M9L, SANYO
COUT12, COUT22: 22µF/X5R/0805/6.3V × 3, GRM21BR60J226ME39, MUR ATA
CIN = 150µF/20V, OS-CON, 20SEP150M, SANYO
L1, L2: 1.2µH, WURTH ELEKTRONIK, 744325120
M1, M3: BSC080N03LS
M2, M4: BSC030N03LS
73.2kΩ
10kΩ
1µF
VOUTLDO



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