DocumentationDatasheet
Reliability Data
cad_symbol
Features
- High Efficiency: Up to 96%
- 600mA Output Current at VIN = 3V
- 2.5V to 5.5V Input Voltage Range
- 1.5MHz Constant Frequency Operation
- No Schottky Diode Required
- Low Quiescent Current: 300µA
- 0.6V Reference Allows Low Output Voltages
- Shutdown Mode Draws < 1µA Supply Current
- Current Mode Operation for Excellent Line and Load Transient Response
- Overtemperature Protected
- Low Profile (1mm) ThinSOTTM Package
Typical Application
Description
The LTC3406B-1.2 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current with no load is 300µA dropping to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406B-1.2 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications.
Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The LTC3406B-1.2 is available in a low profile (1mm) ThinSOT package.
Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131.
| Vout | Fsw | Features | |
| LTC3406 | Adj. | 1.5MHz | Burst Mode |
| LTC3406-1.2 | 1.2V | 1.5MHz | Burst Mode |
| LTC3406-1.5 | 1.5V | 1.5MHz | Burst Mode |
| LTC3406-1.8 | 1.8V | 1.5MHz | Burst Mode |
| LTC3406B | Adj. | 1.5MHz | Burst Mode Disabled |
| LTC3406B-1.2 | 1.2V | 1.5MHz | Burst Mode Disabled |
| LTC3406B-2 | Adj. | 2.25MHz | Burst Mode Disabled |
| LTC3406A | Adj. | 1.5MHz | Low Ripple Burst Mode |
| LTC3406AB | Adj. | 1.5MHz | Burst Mode Disabled |
| LTC3406AB-2 | Adj. | 2.25MHz | Burst Mode Disabled |
SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC3406ABES5#TRMPBF | SOT | 5 | E | $2.61 | $1.88 |
| LTC3406ABES5#TRPBF | SOT | 5 | E | $2.61 | $1.83 |
| LTC3406ABES5-2#TRMPBF | SOT | 5 | E | $2.61 | $1.88 |
| LTC3406ABES5-2#TRPBF | SOT | 5 | E | $2.61 | $1.83 |
| LTC3406AES5#TRMPBF | SOT | 5 | E | $2.61 | $1.88 |
| LTC3406AES5#TRPBF | SOT | 5 | E | $2.61 | $1.83 |
| LTC3406AIS5#PBF | SOT | 5 | I | $3.00 | |
| LTC3406AIS5#TRMPBF | SOT | 5 | I | $3.00 | $2.15 |
| LTC3406AIS5#TRPBF | SOT | 5 | I | $3.00 | $2.10 |
| LTC3406B-2ES5#TRMPBF | SOT | 5 | E | $3.07 | $2.18 |
| LTC3406B-2ES5#TRPBF | SOT | 5 | E | $3.07 | $2.16 |
| LTC3406BES5#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406BES5#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406BES5-1.2#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406BES5-1.2#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406BES5-1.5#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406BES5-1.5#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406BES5-1.8#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406BES5-1.8#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406ES5#PBF | SOT | 4 | E | $2.86 | |
| LTC3406ES5#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406ES5#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406ES5-1.2#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406ES5-1.2#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406ES5-1.5#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406ES5-1.5#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406ES5-1.8#TRMPBF | SOT | 5 | E | $2.86 | $2.03 |
| LTC3406ES5-1.8#TRPBF | SOT | 5 | E | $2.86 | $2.01 |
| LTC3406ES5 | SOT | 5 | E | $5.72 | |
| LTC3406ES5#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406ES5-1.5 | SOT | 5 | E | $5.72 | |
| LTC3406ES5-1.5#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406ES5-1.8 | SOT | 5 | E | $5.72 | |
| LTC3406ES5-1.8#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406BES5 | SOT | 5 | E | $5.72 | |
| LTC3406BES5#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406BES5-1.5 | SOT | 5 | E | $5.72 | |
| LTC3406BES5-1.5#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406BES5-1.8 | SOT | 5 | E | $5.72 | |
| LTC3406BES5-1.8#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406B-2ES5 | SOT | 5 | E | $6.14 | |
| LTC3406B-2ES5#TR | SOT | 5 | E | $6.14 | $4.32 |
| LTC3406BES5-1.2 | SOT | 5 | E | $5.72 | |
| LTC3406BES5-1.2#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406ES5-1.2 | SOT | 5 | E | $5.72 | |
| LTC3406ES5-1.2#TR | SOT | 5 | E | $5.72 | $4.02 |
| LTC3406B-2ES5#TRM | SOT | 5 | E | $6.14 | $4.36 |
| LTC3406BES5#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406BES5-1.2#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406BES5-1.5#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406BES5-1.8#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406ES5#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406ES5-1.2#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406ES5-1.5#TRM | SOT | 5 | E | $5.72 | $4.06 |
| LTC3406ES5-1.8#TRM | SOT | 5 | E | $5.72 | $4.06 |
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.