ADP3178JR AD [Analog Devices], ADP3178JR Datasheet - Page 14

• Manufacturer Part Number: ADP3178JR
• Description: 4-Bit Programmable Synchronous Buck Controllers
• Manufacturer: AD [Analog Devices]

ADP3158/ADP3178
Signal Circuitry
12. The output voltage is sensed and regulated between the
GND pin (which connects to the signal ground plane) and
the CS– pin. The output current is sensed (as a voltage)
and regulated between the CS– pin and the CS+ pin. In
order to avoid differential mode noise pickup in those sensed
signals, their loop areas should be small. Thus the CS–
trace should be routed atop the signal ground plane, and
the CS+ and CS– traces should be routed as a closely
coupled pair (CS+ should be over the signal ground plane
as well).
0.1574 (4.00)
0.1497 (3.80)
0.0098 (0.25)
0.0040 (0.10)
PIN 1
16
1
0.050 (1.27)
0.3937 (10.00)
Dimensions shown in inches and (mm).
0.3859 (9.80)
BSC
OUTLINE DIMENSIONS
0.0192 (0.49)
0.0138 (0.35)
(R-16A/SO-16)
16-Lead SOIC
0.0688 (1.75)
0.0532 (1.35)
9
8
SEATING
PLANE
0.2440 (6.20)
0.2284 (5.80)
13. The CS+ and CS– traces should be Kelvin-connected to
0.0099 (0.25)
0.0075 (0.19)
the current sense resistor so that the additional voltage drop
due to current flow on the PCB at the current sense resistor
connections does not affect the sensed voltage. It is desir-
able to have the controller IC close to the output capacitor
bank and not in the output power path, so that any voltage
drop between the output capacitors and the GND pin is
minimized, and voltage regulation is not compromised.
8
0
0.0196 (0.50)
0.0099 (0.25)
0.0500 (1.27)
0.0160 (0.41)
45