LTC3588-1 Linear Technology, LTC3588-1 Datasheet

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LTC3588-1

Manufacturer Part Number
LTC3588-1
Description
Piezoelectric Energy Harvesting Power Supply
Manufacturer
Linear Technology
Datasheet
www.DataSheet4U.com
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APPLICATIONS
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TYPICAL APPLICATION
FEATURES
950nA Input Quiescent Current (Output in
Regulation – No Load)
450nA Input Quiescent Current in UVLO
2.7V to 20V Input Operating Range
Integrated Low-Loss Full-Wave Bridge Rectifi er
Up to 100mA of Output Current
Selectable Output Voltages of 1.8V, 2.5V, 3.3V, 3.6V
High Effi ciency Integrated Hysteretic Buck DC/DC
Input Protective Shunt – Up to 25mA Pull-Down at
V
Wide Input Undervoltage Lockout (UVLO) Range
Available in 10-Lead MSE and 3mm × 3mm DFN
Packages
Piezoelectric Energy Harvesting
Electro-Mechanical Energy Harvesting
Wireless HVAC Sensors
Mobile Asset Tracking
Tire Pressure Sensors
Battery Replacement for Industrial Sensors
Remote Light Switches
Standalone Nanopower Buck Regulator
IN
100mA Piezoelectric Energy Harvesting Power Supply
C
25V
STORAGE
≥ 20V
1μF
6V
4.7μF
6V
ADVANCED CERAMETRICS PFC-W14
PZ1
V
CAP
V
IN
IN2
LTC3588-1
GND
PGOOD
D0, D1
35881 TA01
V
PZ2
OUT
SW
2
10μH
OUTPUT
VOLTAGE
SELECT
47μF
6V
V
OUT
DESCRIPTION
The LTC
rectifi er with a high effi ciency buck converter to form a
complete energy harvesting solution optimized for high
output impedance energy sources such as piezoelectric
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 effi ciently 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.
Harvesting Power Supply
®
3588-1 integrates a low-loss full-wave bridge
LTC3588-1 3.3V Regulator Start-Up Profi le
22
20
18
16
14
12
10
8
6
4
2
0
Piezoelectric Energy
0
C
NO LOAD, I
STORAGE
= 22μF , C
VIN
200
= 2μA
TIME (s)
OUT
PGOOD = LOGIC 1
= 47μF
V
400
IN
V
LTC3588-1
OUT
35881 TA01b
600
35881f
1

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LTC3588-1 Summary of contents

Page 1

... 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 ...

Page 2

... LTC3588-1 ABSOLUTE MAXIMUM RATINGS V IN Low Impedance Source ....................... –0.3V to 18V* Current Fed ...................................... 25mA SW PZ1, PZ2 ........................................................... D0, D1 .............. –0.3V to [Lesser of (V CAP ......................[Higher of –0. ....................–0.3V to [Lesser of (V IN2 * V has an internal 20V clamp IN † For t < 1ms and Duty Cycle < 1%, ...

Page 3

... Output Selected Sleep Threshold Wake-Up Threshold 2.5V Output Selected Sleep Threshold Wake-Up Threshold 3.3V Output Selected Sleep Threshold Wake-Up Threshold 3.6V Output Selected Sleep Threshold Wake-Up Threshold As a Percentage of the Selected V OUT V = 3.6V OUT LTC3588-1 MIN TYP MAX UNITS l 18.0 V 450 700 nA 950 1500 nA 1.7 2.5 μA ...

Page 4

... LTC3588-1 ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3588E-1 is guaranteed to meet performance specifi cations from 0° ...

Page 5

... G10 V Line Regulation OUT 2. 10μ 100mA LOAD 2.54 2.52 2.50 2.48 2.46 2.44 100m (V) IN 35881 G13 LTC3588-1 1.8V Output vs Temperature 1.85 SLEEP THRESHOLD 1.80 WAKE-UP THRESHOLD 1.75 1.70 PGOOD FALLING 1.65 1.60 1M 10M 100M –55 –35 – TEMPERATURE (°C) 35881 G08 3.6V Output vs Temperature 3.65 SLEEP THRESHOLD 3 ...

Page 6

... LTC3588-1 TYPICAL PERFORMANCE CHARACTERISTICS I vs Temperature PEAK 300 290 280 270 260 250 240 230 220 210 200 –55 –35 – TEMPERATURE (°C) Effi ciency 10μH LOAD 100 OUT 20 V OUT V OUT ...

Page 7

... OUT 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. LTC3588-1 to GND. This pin is not IN2 or low to GND to select desired V IN2 ...

Page 8

... LTC3588-1 BLOCK DIAGRAM PZ1 PZ2 D1, D0 www.DataSheet4U.com 8 20V INTERNAL RAIL GENERATION BUCK UVLO CONTROL SLEEP BANDGAP REFERENCE 2 3 CAP IN2 GND OUT PGOOD 10 PGOOD COMPARATOR 35881 BD 35881f ...

Page 9

... Internal Bridge Rectifi er The LTC3588-1 has an internal full-wave bridge rectifi er accessible via the differential PZ1 and PZ2 inputs that rectifi inputs such as those from a piezoelectric element. The rectifi ed output is stored on a capacitor at ...

Page 10

... This OUT allows output energy to be used even if the input is lost. Figure 2 shows the behavior for 75s the quiescent current of the LTC3588-1 and through servicing V current until V decreases to 92% of the desired regulation point. ...

Page 11

... V support a larger current for some duration. For example, OUT a current burst could begin when PGOOD goes high and would continuously deplete the output capacitor until PGOOD = LOGIC1 PGOOD went low 35881 F03 LTC3588-1 35881f 11 ...

Page 12

... Measurement Specialties PI (Physik Instrumente) MIDE Technology Corporation Morgan Technical Ceramics The LTC3588-1 will gather energy and convert use- able output voltage to power microprocessors, wireless sensors, and wireless transmission components. Such a wireless sensor application may require much more peak power than a piezoelectric element can produce. However, the LTC3588-1 accumulates energy over a long period of time to enable effi ...

Page 13

... While active, a microprocessor may draw a small load www.DataSheet4U.com when operating sensors, and then draw a large load to transmit data. Figure 5 shows the LTC3588-1 responding smoothly to such a load step. Input and Output Capacitor Selection The input and output capacitors should be selected based on the energy needs and load requirements of the ap- plication ...

Page 14

... V An optional 5.6V Zener diode can be connected to V clamp V below its Zener voltage should be considered as it may be comparable to the quiescent current of the LTC3588-1. This circuit does not require the capacitors on V CAP , saving components and allowing a lower voltage rating for the single V 5 ...

Page 15

... APPLICATIONS INFORMATION 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 ...

Page 16

... The LTC3588-1 bridge rectifi er can handle a wide range of input frequencies. The LTC3588-1 can also be confi gured for use with DC sources such as a solar panel or thermal couple as shown in Figures 11 and 12 by connecting them to one of the PZ1/PZ2 inputs. Connecting the two sources in this way prevents reverse current from fl ...

Page 17

... S PZ1 PZ2 V PGOOD IN 1μF LTC3588-1 6V CAP SW 5.4V 1μF 16V V V IN2 OUT D0 4.7μ GND Figure 12. Thermoelectric Energy Harvester LTC3588-1 PGOOD 10μH V OUT 2. 2.7V 10μF NESS SUPER CAPACITOR 6V ESHSR-0003CO-002R7 35881 F11 PGOOD 10μH V OUT 2.5V 47μF 6V 35881 F12 35881f 17 ...

Page 18

... LTC3588-1 PACKAGE DESCRIPTION 3.50 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4 ...

Page 19

... DETAIL “A” 0.254 (.010) 0 – 6 TYP 0.53 0.152 (.021 .006) DETAIL “A” SEATING PLANE 0.17 – 0.27 (.007 – .011) TYP LTC3588-1 BOTTOM VIEW OF EXPOSED PAD OPTION 2.06 0.102 (.081 .004) 1 1.83 0.102 (.072 .004) 10 0.497 0.076 (.0196 .003 ...

Page 20

... Operating Range, Low Ripple Burst Mode Operation Q 4.5V to 45V Operating Range, Overvoltage Lockout Up to 60V Q 4.5V to 45V Operating Range, Overvoltage Lockout Up to 60V Q www.linear.com ● Peak-to-Peak Output Ripple vs C 120 C = 1μF OUT2 100 V (LTC3588-1) OUT1 (LT3009-3.3) OUT2 100 C (μF) OUT1 , 1 ...

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