Datasheet

ADP2114 Data Sheet
Rev. B | Page 6 of 40
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1GND
2COMP1
3FREQ
4SCFG
5SYNC/CLKOUT
6OPCFG
7COMP2
8VDD
24 SW1
23 SW2
22 PGND1
21 PGND2
20 PGND3
19 PGND4
18 SW3
17 SW4
9
FB2
10
V2SET
11
SS2
12
PGOOD2
13
EN2
14
VIN4
15
VIN5
16
VIN6
32
FB1
31
V1SET
30
SS1
29
PGOOD1
28
EN1
27
VIN1
26
VIN2
25
VIN3
TOP VIEW
(Not to Scale)
ADP2114
THERMAL PAD
NOTES
1. CONNECT THE EXPOSED THERMAL PAD TO THE
SIGNAL/ANALOG GROUND PLANE.
08143-003
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 GND
Ground for the Internal Analog and Digital Circuits. Connect GND to the signal/analog ground plane before
connecting to the power ground.
2 COMP1
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.
3 FREQ
Frequency Select Input. Connect this pin through a resistor to GND to set the appropriate switching frequency
(see Table 5).
4 SCFG
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.
5 SYNC/CLKOUT
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.
6 OPCFG
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.
7 COMP2
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.
8 VDD
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.
9 FB2
Feedback Voltage Input for Channel 2. For the fixed output voltage option, connect FB2 to V
OUT2
. For the
adjustable output voltage option, connect this pin to a resistor divider between V
OUT2
and GND. The reference
voltage for the adjustable output voltage option is 0.6 V. With multiphase configurations, connect FB2 to FB1
and then connect them to V
OUT
.
10 V2SET
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
OUT2
. See Table 4
for output voltage selection.
11 SS2
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.
12 PGOOD2
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.
13 EN2
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.