ADP2114 Analog Devices, ADP2114 Datasheet - Page 6

• Manufacturer Part Number: ADP2114
• Description: Configurable, Dual 2 A/Single 4 A, Synchronous Step-Down DC-to-DC Regulator
• Manufacturer: Analog Devices

ADP2114
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Mnemonic
GND
COMP1
FREQ
SCFG
SYNC/CLKOUT
OPCFG
COMP2
VDD
FB2
V2SET
SS2
PGOOD2
EN2
Description
Ground for the Internal Analog and Digital Circuits. Connect GND to the signal/analog ground plane before
connecting to the power ground.
Error Amplifier Output for Channel 1. Connect a series RC network from COMP1 to GND to compensate for
Channel 1. For multiphase operation, tie COMP1 and COMP2 together.
Frequency Select Input. Connect this pin through a resistor to GND to set the appropriate switching frequency
(see Table 5).
Synchronization Configuration Input. SCFG configures the SYNC/CLKOUT pin as an input or output. Tie this pin
to VDD to configure SYNC/CLKOUT as an output. Tie this pin to GND to configure SYNC/CLKOUT as an input.
This is a configurable bidirectional pin (configured with the SCFG pin—see the Pin 4 description for details).
When SYNC/CLKOUT is an output, a buffered clock of twice the switching frequency with a phase shift of 90°
is available on this pin. When configured as an input, this pin accepts an external clock to which the converters
are synchronized. The frequency select resistor, mentioned in the description of Pin 3, must be selected close to
the expected switching frequency for stable operation.
Operation Configuration Input. Connect this pin through a resistor to GND to set the system mode of operation
according to Table 7. This pin can be used to select a peak current limit for each power channel and enable or
disable the pulse skip mode.
Error Amplifier Output for Channel 2. Connect a series RC network from COMP2 to GND to compensate the
Channel 2. Tie COMP1 and COMP2 together for multiphase configuration.
Power Supply Input. The power source for the ADP2114 internal circuitry. Connect VDD and VINx with a
10 Ω resistor as close as possible to the ADP2114. Bypass VDD to GND with a 1 μF or greater capacitor.
Feedback Voltage Input for Channel 2. For the fixed output voltage option, connect FB2 to V
adjustable output voltage option, connect this pin to a resistor divider between V
voltage for the adjustable output voltage option is 0.6 V. With multiphase configurations, connect FB2 to FB1
and then connect them to V
Output Voltage Set Pin for Channel 2. Connect this pin through a resistor to GND or tie to VDD to select a fixed
output voltage option (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, or 3.3 V) or an adjust output voltage for V
for output voltage selection.
Soft Start Input for Channel 2. Place a capacitor from SS2 to GND to set the soft start period. A 10 nF capacitor
sets a 1 ms soft start period. For multiphase configuration, connect SS2 to SS1.
Open-Drain Power Good Output for Channel 2. Place a 100 kΩ pull-up resistor to VDD or any other voltage ≤ 5.5 V;
PGOOD2 pulls low when Channel 2 is out of regulation.
Enable Input for Channel 2. Drive EN2 high to turn on the Channel 2 converter and drive EN2 low to turn off
Channel 2. Tie EN2 to VDD for startup with VDD. With multiphase configuration, tie EN2 to EN1.
SYNC/CLKOUT
NOTES
1. CONNECT THE EXPOSED THERMAL PAD TO THE
SIGNAL/ANALOG GROUND PLANE.
COMP1
OPCFG
COMP2
FREQ
SCFG
GND
VDD
OUT
.
Figure 3. Pin Configuration
1
2
3
4
5
6
7
8
Rev. 0 | Page 6 of 40
THERMAL PAD
(Not to Scale)
ADP2114
TOP VIEW
24 SW1
23 SW2
22 PGND1
21 PGND2
20 PGND3
19 PGND4
18 SW3
17 SW4
OUT2
and GND. The reference
OUT2
OUT2
. For the
. See Table 4