LTC3588EDD-1#PBF Linear Technology, LTC3588EDD-1#PBF Datasheet - Page 14

• Manufacturer Part Number: LTC3588EDD-1#PBF
• Description: IC ENEGRY HARVESTING PSU 10DFN
• Manufacturer: Linear Technology

Specifications of LTC3588EDD-1#PBF

• Applications: Energy Harvesting
• Voltage - Supply: 2.7 V ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Ic Function: Power Management IC
• Supply Voltage Range: 2.7V To 20V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: DFN
• No. Of Pins: 10
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

APPLICATIONS INFORMATION
LTC3588-1
Additional Applications with Piezo Inputs
The versatile LTC3588-1 can be used in a variety of con-
fi gurations. Figure 7 shows a single piezo source powering
two LTC3588-1s simultaneously, providing capability for
multiple rail systems. This setup features automatic sup-
ply sequencing as the LTC3588-1 with the lower voltage
output (i.e. lower UVLO rising threshold) will come up fi rst.
As the piezo provides input power both V
initially come up together, but when one output starts
drawing power, only its corresponding V
bridges of each LTC3588-1 provide isolation. Input piezo
energy will then be directed to this lower voltage capacitor
until both V
expandable to any number of LTC3588-1s powered by a
single piezo as long as the piezo can support the sum total
of the quiescent currents from each LTC3588-1.
14
3.6V
IN
rails are again equal. This confi guration is
PGOOD1
10μF
6V
10μH
PZ1
PGOOD
SW
V
OUT
IR05H40CSPTR
LTC3588-1
9V
BATTERY
GND
Figure 7. Dual Rail Power Supply with Single Piezo and
Automatic Supply Sequencing
Figure 8. Piezo Energy Harvester with Battery Backup
V
CAP
PZ2
V
IN2
D1
D0
IN
100μF
16V
IN
will fall as the
IN
1μF
6V
4.7μF
6V
rails will
PIEZO SYSTEMS T220-A4-503X
4.7μF
6V
1μF
6V
PZ1
V
CAP
V
D1
D0
IN
IN2
MIDE V25W
LTC3588-1
10μF
25V
GND
A piezo powered LTC3588-1 can also be used in concert
with a battery connected to V
if ambient vibrational energy ceases as shown in Figure 8.
A blocking diode placed in series with the battery to
V
source charges V
is shown, but any stack of batteries of a given chemistry
can be used as long as the battery stack voltage does not
exceed 18V. In this setup the presence of the piezo energy
harvester can greatly increase the life of the battery. If
the piezo source is removed the LTC3588-1 can serve as
a standalone nanopower buck converter. In this case the
bridge is unused and the blocking diode is unnecessary.
PGOOD
IN
V
10μF
25V
PZ2
PZ1
PZ2
OUT
SW
prevents reverse current in the battery if the piezo
10μH
4.7μF
6V
PGOOD
1μF
6V
35881 F08
PZ1
V
CAP
V
D1
D0
IN
IN2
IN
47μF
6V
V
3.3V
LTC3588-1
past the battery voltage. A 9V battery
OUT
GND
PGOOD
V
PZ2
OUT
SW
IN
to supplement the system
10μH
PGOOD2
35881 F07
10μF
6V
1.8V
35881fa