DocumentationDatasheet
Reliability Data
cad_symbol
Features
- High Efficiency: Up to 96%
- Very Low Quiescent Current: Only 20µA
- Low Output Ripple Voltage During Burst Mode Operation
- 600mA Output Current
- 2.5V to 5.5V Input Voltage Range
- 1.5MHz Constant Frequency Operation
- No Schottky Diode Required
- Low Dropout Operation: 100% Duty Cycle
- ±2% 0.6V Reference
- Shutdown Mode Draw =1µA Supply Current
- Internal Soft-Start Limits Inrush Current
- Current Mode Operation for Excellent Line and Load Transient Response
- Overtemperature Protected
- Low Profile (1mm) ThinSOT Package
Typical Application
Description
The LTC3406A is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20µA, dropping to =1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406A ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery runtime portable systems. Automatic Burst Mode operation increases efficiency at light loads, further extending battery runtime.
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. Low output voltages are easily supported with the 0.6V feedback reference voltage. The LTC3406A is available in a low profile (1mm) ThinSOT package.
| 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.