17
DEMO MANUAL
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
5% DUTY CYCLE MAX.
2mV / Amp
DYNAMIC LOAD CIRCUITS
5% DUTY CYCLE MAX.
2mV / Amp
BIAS SUPPLY FOR DrMOS and LTC7852
3.3V AUXILIARY SUPPLY
NOTE: PRE-LOAD RESISTORS ARE STUFFED AT C48 AND C50.
[2]
[2]
NOTE:
If external 5V bias is applied, remove R84 and place the 5VBIAS jumper in the OFF position.
Next, connect the external supply to the 5VBIAS turret and turn-on supply,
Do not hot plug.
NOTE:
If external 3.3V bias is applied, remove R129 and place the 3.3VAUX jumper in the OFF position.
Next, connect the external supply to the 3.3VAUX turret and turn-on supply,
Do not hot plug.
VOUT1
VOUT2
VOUT1
VOUT2
VIN
VIN
5VBIAS
VIN
VO2PH4
VO2PH5
5VBIAS
3.3VAUX
VIN
VOUT1
VOUT2
DATE:
SHEET
OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES APPLICATIONS ENGINEERING FOR ASSISTANCE.
22
` \
` f
LTC7852ERHE
HIGH EFFICIENCY 6 PHASE STEP-DOWN CONVERTER
DC2631A
710-DC2631A_REV04
N/A
Tuesday, June 26, 2018
DATE:
SHEET
OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES APPLICATIONS ENGINEERING FOR ASSISTANCE.
22
` \
` f
LTC7852ERHE
HIGH EFFICIENCY 6 PHASE STEP-DOWN CONVERTER
DC2631A
710-DC2631A_REV04
N/A
Tuesday, June 26, 2018
DATE:
SHEET
OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES APPLICATIONS ENGINEERING FOR ASSISTANCE.
22
` \
` f
LTC7852ERHE
HIGH EFFICIENCY 6 PHASE STEP-DOWN CONVERTER
DC2631A
710-DC2631A_REV04
N/A
Tuesday, June 26, 2018
+
COUT36
1
2
E28
3.3V/50mA
3.3VAUX
C50 100 1% 0805
J8
VOUT2
E24
PULSE GEN 2
+
COUT44
1
2
R129
0
1206
L7
15uH
E25
GND
R88 20k
+
COUT43
OPT 7343
1
2
C42
22uF
COUT8 OPT 1206
CIN16 OPT 1210
+
COUT32
1
2
+
COUT45
1
2
R127 100k 1%
C47 1uF 50V 0805
COUT10 OPT 1206
CIN19 OPT 1210
C46 1uF 50V 0805
R126
1M
C48 100 1% 0805
+
COUT35
1
2
E29
GND
COUT4
CIN18 OPT 1210
+
COUT46
OPT 7343
1
2
E22
JP3
ON
OFF
5VBIAS
1
3
2
+
COUT48
1
2
COUT12 OPT 1206
E18
PULSE GEN 1
R125
1
R91 0.002 1% 2512
CIN22 OPT 1210
C44 OPT
+
COUT34
OPT 7343
1
2
CIN17 OPT 1210
COUT6
CIN23 OPT 1210
+
COUT47
1
2
R86 105k
C51 47uF
0805
6.3V
E19
5.0V / 500mA
5VBIAS
CIN24 OPT 1210
COUT2
OPT 1206
CIN21 OPT 1210
R84
0
1206
C68 2.2uF
J7
VOUT1
+
COUT37
OPT 7343
1
2
R128 162k
D1
PMEG4005AEA
JP4
ON
OFF
3.3VAUX
1
3
2
CIN25 OPT 1210
CIN20 OPT 1210
+
COUT38
1
2
E26
R87 0.002 1% 2512
C49 47uF
0805
6.3V
CIN26 OPT 1210
R89 0
C43 10uF
U9
LT3010EMS8E
GND
4
SHDN
5
IN
8
OUT
1
SENSE/ADJ
2
GND
9
NC
3
NC
6
NC
7
R90 10k 1%
E27
ISTEP2-
C40
1uF
+
COUT40
OPT 7343
1
2
CIN27 OPT 1210
C66 2.2uF
E20
GND
C41
100nF
+
COUT41
1
2
E23
ISTEP1-
+
COUT39
1
2
E21
GND
+
COUT31
OPT 7343
1
2
C67 220pF
C45 OPT
U8
LT3502EDC
VIN
1
BD
2
FB
3
SHDN
4
GND
5
DA
6
BOOST
7
SW
8
9
GND
Q1
FDB8832
+
COUT42
1
2
R85 10k 1%
Q2
FDB8832
+
COUT33
1
2
C69 2.2uF