Series: -
Number of Outputs: 1
Synchronous Rectifier: No
Operating Temperature: 0°C ~ 70°C
Mounting Type: Surface Mount
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package: 8-SOIC
Type: Step-Up (Boost)
Packaging: Tube
Output Type: Fixed
Voltage - Output: 5V
Current - Output: 1A
Frequency - Switching: 600kHz
Manufacturer: Linear Technology
PWM Type: Current Mode, Hybrid
Voltage - Input: 1 V ~ 10 V
DescriptionThe LT1308CS8 is one member of the LT1308 series.The LT1308 is a micropower, fixed frequency boost DC/DC converter that operates from an input voltage as low as 1V. Capable of delivering 5V at load current of 1A from a single Li-Ion cell, the LT1308 also features power saving Burst Mode operation at light loads. High efficiency is maintained over a broad 1mA to 1A load range.
Features of the LT1308CS8 are:(1)low quiescent current: 100A; (2)operates with Vin as Low as 1V; (3)fixed frequency operation: 600kHz; (4)Guaranteed Start-Up into Full Load; (5)Low Shutdown Current: 3A; (6)Low-Battery Comparator.The device contains a low-battery detector with a 200mV reference and shuts down to less than 5A quiescent current. No-load quiescent current is 100A and the internal NPN power switch handles a 2A current with a voltage drop of just 300mV.
The absolute maximum ratings of the LT1308CS8 can be summarized as:(1)SW voltage:30V ;(2)storage temperature range:-65 to +150;(3)operating temperature range:-40 to +85;(4)juction temperature:125;(5)lead temperature (soldering, 10 sec):300°C.If a lab supply is used, the leads used to connect the circuit to the supply can have significant inductance at the LT1308's switching frequency. As in the previous situation, an electrolytic capacitor may be required at the circuit in order to reduce the AC impedance of the input sufficiently. An alternative solution is to attach the circuit directly to the power supply at the supply terminals,without the use of leads. The power supply's output capacitance will then provide the bulk capacitance the LT1308 circuit requires.The LT1308 is suitable for converting a single Li-Ion cell to 5V for powering GSM RF power stages. Figure 6 details a Li-Ion to 5V converter circuit using frequency compensation optimized for a typical GSM pulsed load. Figure 7 details transient response of Figure 6's circuit with a 100mA to 1A pulsed load. A slower time sweep is used to show several transmit pulses in Figure 8.
Parameters: | Technical/Catalog Information | LT1308CS8 |
| Vendor | Linear Technology |
| Category | Integrated Circuits (ICs) |
| Type | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage - Input | 1 ~ 10 V |
| Voltage - Output | 5V |
| Current - Output | 1A |
| Power - Output | - |
| Package / Case | 8-SOIC (3.9mm Width) |
| Packaging | Bulk |
| Internal Switch(s) | Yes |
| Synchronous | No |
| Rds (On) | - |
| Operating Temperature | 0°C ~ 70°C |
| Frequency - Switching | 600kHz |
| Drawing Number | 161; 05-08-1610; S; 8 |
| Lead Free Status | Contains Lead |
| RoHS Status | RoHS Non-Compliant |
| Other Names | LT1308CS8
LT1308CS8
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LT1308CS8 Data Sheet
