Datasheet

ADP2126/ADP2127 Data Sheet
Rev. B | Page 6 of 20
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
MODE VIN
SW
FB GND
1
A
B
C
2
BALL
A
1
INDICATOR
EXTCLK
TOP VIEW
BALL/PAD SIDE DOWN
BUMPS/PADS ON OPPOSITE SIDE
(Not to Scale)
09658-005
Figure 4. Pin Configuration
Table
4. Pin Function Descriptions
Pin No. Mnemonic Description
A1 MODE
Mode Select. This pin toggles between auto mode (PFM and PWM switching) and PWM mode. Set MODE low to
allow the part to operate in auto mode. Pull MODE high to force the part to operate in PWM mode. The voltage
applied to MODE should never be higher than the voltage applied to VIN. Do not leave this pin floating.
A2 VIN Power Supply Input.
B1 SW Switch Node.
B2 EXTCLK
External Clock Enable Signal. The ADP2126/ADP2127 power up when a clock signal (6 MHz to 27 MHz) or a logic high
signal (EXTCLK ≥ 1.3 V) is detected on this pin. (The logic high enable feature is only available on certain models.)
C1 FB
Feedback Divider Input. Connect the output capacitor from FB to GND to set the output voltage ripple and to
complete the control loop.
C2 GND Ground.