Document
FEATURES
nn 950nA Input Quiescent Current (Output in Regulation – No Load)
nn 450nA Input Quiescent Current in UVLO nn 2.7V to 20V Input Operating Range nn Integrated Low-Loss Full-Wave Bridge Rectifier nn Up to 100mA of Output Current nn Selectable Output Voltages of 1.8V, 2.5V, 3.3V, 3.6V nn High Efficiency Integrated Hysteretic Buck DC/DC nn Input Protective Shunt – Up to 25mA Pull-Down at
VIN ≥ 20V nn Wide Input Undervoltage Lockout (UVLO) Range nn Available in 10-Lead MSE and 3mm × 3mm DFN
Packages
APPLICATIONS
nn Piezoelectric Energy Harvesting nn Electro-Mechanical Energy Harvesting nn Wireless HVAC Sensors nn Mobile Asset Tracking nn Tire Pressure Sensors nn Battery Replacement for Industrial Sensors nn Remote Light Switches nn Standalone Nanopower Buck Regulator
LTC3588-1
Nanopower Energy Harvesting Power Supply
DESCRIPTION
The LTC®3588-1 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric, solar, or magnetic transducers. An ultralow quiescent current undervoltage lockout (UVLO) mode with a wide hysteresis window allows charge to accumulate on an input capacitor until the buck converter can efficiently transfer a portion of the stored charge to the output. In regulation, the LTC3588-1 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation.
Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin selectable with up to 100mA of continuous output current; however, the output capacitor may be sized to service a higher output current burst. An input protective shunt set at 20V enables greater energy storage for a given amount of input capacitance.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
100mA Piezoelectric Energy Harvesting Power Supply
CSTORAGE 25V
1µF 6V
4.7µF 6V
MIDE V21BL
PZ1
PZ2
VIN LTC3588-1 SW VOUT
CAP
PGOOD
VIN2
D0, D1
GND
35881 TA01
10µH
2 OUTPUT VOLTAGE SELECT
VOUT
47µF 6V
VOLTAGE (V)
LTC3588-1 3.3V Regulator Start-Up Profile
22
20
CSTORAGE = 22µF, COUT = 47µF NO LOAD, IVIN = 2µA
18
16
14
VIN
12
10
8
6
4
VOUT
2
PGOOD = LOGIC 1
0
0
200
400
600
TIME (s)
35881 TA01b
For more information www.linear.com/LTC3588-1
35881fc
1
LTC3588-1
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN Low Impedance Source........................ –0.3V to 18V* Current Fed, ISW = 0A....................................... 25mA†
PZ1, PZ2............................................................0V to VIN D0, D1...............–0.3V to [Lesser of (VIN2 + 0.3V) or 6V] CAP....................... [Higher of –0.3V or (VIN – 6V)] to VIN VIN2.................... –0.3V to [Lesser of (VIN + 0.3V) or 6V]
* VIN has an internal 20V clamp † For t < 1ms and Duty Cycle < 1%,
Absolute Maximum Continuous Current = 5mA
VOUT.....................–0.3V to Lesser of (VIN2 + 0.3V) or 6V PGOOD............... –0.3V to Lesser of (VOUT + 0.3V) or 6V IPZ1, IPZ2.............................................................. ±50mA ISW....................................................................... 350mA Operating Junction Temperature Range
(Notes 2, 3)................................................. –40 to 125°C
Storage Temperature Range.......................–65 to 150°C
Lead Temperature (Soldering, 10 sec)
MSE Only........................................................... 300°C
PIN CONFIGURATION
TOP VIEW
PZ1 1 PZ2 2 CAP 3 VIN 4 SW 5
10 PGOOD
9 D0
11
GND
8 D1
7 VIN2
6 VOUT
DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 7.5°C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
PZ1 1
10 PGOOD
PZ2 2 CAP 3 VIN 4
11 GND
9 D0 8 D1 7 VIN2
SW 5
6 VOUT
MSE PACKAGE 10-LEAD PLASTIC eMSOP
TJMAX = 125°C, θJA = 45°C/W, θJC = 10°C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3588EDD-1#PBF
LTC3588EDD-1#TRPBF LFKY
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3588IDD-1#PBF
LTC3588IDD-1#TRPBF LFKY
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3588EMSE-1#PBF LTC3588EMSE-1#TRPBF LTFKX
10-Lead Plastic eMSOP
–40°C to 125°C
LTC3588IMSE-1#PBF
LTC3588IMSE-1#TRPBF LTFKX
10-Lead Plastic eMSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/ This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
.