Series: -
Output Type: Adjustable
Number of Outputs: 1
Synchronous Rectifier: No
Operating Temperature: 0°C ~ 70°C
Mounting Type: Surface Mount
Packaging: Tube
Type: Step-Down (Buck)
Frequency - Switching: -
Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package: 8-MSOP
Voltage - Input: 3 V ~ 18 V
Voltage - Output: Adjustable
Manufacturer: Linear Technology
PWM Type: Burst Mode?
Current - Output: 750mA
Features: High Efficiency: Over 92% Possible
Very Low Standby Current: 10mA Typ
Available in Space Saving 8-Lead MSOP Package
Internal 1.4W Power Switch (VIN = 10V)
Wide VIN Range: 3V to 18V Operation
Very Low Dropout Operation: 100% Duty Cycle
Low-Battery Detector Functional During Shutdown
Programmable Current Limit with Optional Current Sense Resistor (10mA to 400mA Typ)
Short-Circuit Protection
Few External Components Required
Active Low Micropower Shutdown: IQ = 6mA Typ
Pushbutton On/Off (LTC1475 Only)
3.3V, 5V and Adjustable Output VersionsApplicationCellular Telephones and Wireless Modems
4mA to 20mA Current Loop Step-Down Converter
Portable Instruments
Battery-Operated Digital Devices
Battery Chargers
Inverting Converters
Intrinsic Safety ApplicationsPinout
SpecificationsOperating Ambient Temperature Range
Commercial ................................................ 0°C to 70°C
Industrial .............................................. 40°C to 85°C
Junction Temperature (Note 1) ............................ 125°C
Storage Temperature Range .............. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Input Supply Voltage (VIN).........................0.3V to 20V
Switch Current (SW, SENSE) .............................. 750mA
Switch Voltage (SW).............. (VIN 20V) to (VIN + 0.3V)
VFB (Adjustable Versions) ..........................0.3V to 12V
VOUT (Fixed Versions) ................................ 0.3V to 20V
LBI, LBO ....................................................0.3V to 20V
RUN, SENSE .................................. 0.3V to (VIN + 0.3V)
Description
The LTC®1474/LTC1475 series are high efficiency stepdown converters with internal P-channel MOSFET power switches that draw only 10mA typical DC supply current at no load while maintaining output voltage. The LTC1474 uses logic-controlled shutdown while the LTC1475 features pushbutton on/off.
The low supply current coupled with Burst ModeTM operation enables the LTC1474/LTC1475 to maintain high efficiency over a wide range of loads. These features, along with their capability of 100% duty cycle for low dropout and wide input supply range, make the LTC1474/LTC1475 ideal for moderate current (up to 300mA) battery-powered applications.
The peak switch current is user-programmable with an optional sense resistor (defaults to 325mA minimum if not used) providing a simple means for optimizing the design for lower current applications. The peak current control also provides short-circuit protection and excellent startup behavior. A low-battery detector that remains functional in shutdown is provided .
The LTC1474/LTC1475 series availability in 8-lead MSOP and SO packages and need for few additional components provide for a minimum area solution.
Parameters:
| Technical/Catalog Information | LTC1475CMS8 |
| Vendor | Linear Technology |
| Category | Integrated Circuits (ICs) |
| Type | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage - Input | 3 ~ 18 V |
| Voltage - Output | Adjustable |
| Current - Output | 750mA |
| Power - Output | - |
| Package / Case | 8-MSOP, Micro8?, 8-uMAX, 8-uSOP, |
| Packaging | Bulk |
| Internal Switch(s) | Yes |
| Synchronous | No |
| Rds (On) | - |
| Operating Temperature | 0°C ~ 70°C |
| Frequency - Switching | - |
| Drawing Number | 161; 05-08-1660; MS, MS8; 8 |
| Lead Free Status | Contains Lead |
| RoHS Status | RoHS Non-Compliant |
| Other Names | LTC1475CMS8
LTC1475CMS8
|
LTC1475CMS8 Data Sheet
