| Vin (Min) (V) | 2.2 |
| Vin (Max) (V) | 7 |
| Vout (Min) (V) | 1.24 |
| Vout (Max) (V) | 20 |
| Switch current limit (Typ) (A) | 0.15 |
| Regulated outputs (#) | 1 |
| Switching frequency (Min) (kHz) | 600 |
| Switching frequency (Max) (kHz) | 2500 |
| Iq (Typ) (mA) | 0.235 |
| Features | Enable |
| Duty cycle (Max) (%) | 76 |
| Rating | Catalog |
- 2.2-V to 7-V Input Range
- 150-mA, 0.7-? Internal Switch
- Adjustable Output Voltage up to 20 V
- Input Undervoltage Lockout
- 0.01-μA Shutdown Current
- Uses Small Surface-Mount Components
- Small 5-Pin SOT-23 Package
The LM2705 is a micropower step-up DC-DC converter in a small 5-pin SOT-23 package. A current-limited, fixed-off-time control scheme conserves operating current, which results in high efficiency over a wide range of load conditions. The 21-V switch allows for output voltages as high as 20V. The low 400-ns off-time permits the use of tiny, low-profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications. The LM2705 is ideal for LCD panels requiring low current and high efficiency as well as white-LED applications for cellular phone back-lighting. The LM2705 device can drive up to 3 white LEDs from a single Li-Ion battery. The low peak-inductor current of the LM2705 makes it ideal for USB applications.
For all available packages, see the orderable addendum at the end of the data sheet.
