LTC3588-1 Linear Technology, LTC3588-1 Datasheet - Page 7

• Manufacturer Part Number: LTC3588-1
• Description: Piezoelectric Energy Harvesting Power Supply
• Manufacturer: Linear Technology

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PIN FUNCTIONS
PZ1 (Pin 1): Input connection for piezoelectric element or
other AC source (used in conjunction with PZ2).
PZ2 (Pin 2): Input connection for piezoelectric element or
other AC source (used in conjunction with PZ1).
CAP (Pin 3): Internal rail referenced to V
drive for buck PMOS switch. A 1μF capacitor should be
connected between CAP and V
for use as an external system rail.
V
pin serves as an energy reservoir and input supply for the
buck regulator. The V
maximum of 20V (typical).
SW (Pin 5): Switch Pin for the Buck Switching Regulator.
A 10μH or larger inductor should be connected from SW
to V
V
age and adjust it through internal feedback.
IN
OUT
(Pin 4): Rectifi ed Input Voltage. A capacitor on this
OUT
(Pin 6): Sense pin used to monitor the output volt-
.
IN
voltage is internally clamped to a
IN
. This pin is not intended
IN
to serve as gate
V
for buck NMOS switch. Also serves as a logic high rail for
output voltage select bits D0 and D1. A 4.7μF capacitor
should be connected from V
intended for use as an external system rail.
D1 (Pin 8): Output Voltage Select Bit. D1 should be tied
high to V
Table 1).
D0 (Pin 9): Output Voltage Select Bit. D0 should be tied
high to V
Table 1).
PGOOD (Pin 10): Power good output is logic high when
V
referenced to the V
GND (Exposed Pad Pin 11): Ground. The Exposed Pad
should be connected to a continuous ground plane on the
second layer of the printed circuit board by several vias
directly under the LTC3588-1.
IN2
OUT
(Pin 7): Internal low voltage rail to serve as gate drive
is above 92% of the target value. The logic high is
IN2
IN2
or low to GND to select desired V
or low to GND to select desired V
OUT
rail.
IN2
to GND. This pin is not
LTC3588-1
OUT
OUT
(see
(see
35881f
7