LTC1502-3.3 - Single Cell to 3.3V Regulated Charge Pump DC/DC Converter
Features
- Input Voltage Range: 0.9V to 1.8V
- 0.9V Guaranteed Start-Up Voltage
- Regulated Output Voltage: 3.3V ±4%
- Output Current: 10mA (VIN >/= 1V)
- No Inductors
- Shutdown Disconnects Load from VIN
- Low Operating Current: 40µA
- Low Shutdown Current: 5µA
- Short-Circuit and Overtemperature Protected
- Application Circuit Fits in <0.125in² PCB Area
- Available in 8-Pin MSOP and SO Packages
Typical Application
Description
The LTC1502-3.3 is a quadrupler charge pump DC/DC converter that produces a regulated 3.3V output from a single alkaline cell input. It requires only five small external capacitors-no inductors are required. Low supply current (40µA typical, 5µA in shutdown) and minimal external components make the LTC1502-3.3 ideal for space and power conscious single-cell applications. The total printed circuit board area of the circuit shown below is less than 0.125in². Forcing the C1-/SHDN pin through an external resistive pull-down puts the part into shutdown mode. During shutdown, the internal oscillator is stopped and the load is disconnected from VIN. An internal pull-up current on the C1-/SHDN pin forces the part back into normal operation once the pull-down resistance is removed. The LTC1502-3.3 is short-circuit protected and survives an indefinite Vout short to ground. The LTC1502-3.3 is available in 8-pin MSOP and SO packages.Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC1502CMS8-3.3#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1502CMS8-3.3#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1502CS8-3.3#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1502CS8-3.3#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1502IS8-3.3#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1502IS8-3.3#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1502CMS8-3.3#PBF | MS-8 | C | $2.30 | $1.95 | Yes | |
| LTC1502CMS8-3.3#TRPBF | MS-8 | C | $2.01 | Yes | ||
| LTC1502CS8-3.3#PBF | SO-8 | C | $2.10 | $1.75 | Yes | |
| LTC1502CS8-3.3#TRPBF | SO-8 | C | $1.81 | Yes | ||
| LTC1502IS8-3.3#PBF | SO-8 | I | $2.50 | $2.10 | Yes | |
| LTC1502IS8-3.3#TRPBF | SO-8 | I | $2.16 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC239A | LTC1502CMS8-3.3 | Single Cell Input, 3.3V/10mA Output, Inductorless DC-DC Converter | $75.00 | |
| Buy Now | |||
Applications
- Pagers
- Battery Backup Supplies
- Portable Electronic Equipment
- Handheld Medical Instruments
- Glucose Meters
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC1502-3.3
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
