Datasheet LTC3400-1 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 600mA, 1.2MHz Micropower Synchronous Boost Converter in ThinSOT |
| Seiten / Seite | 12 / 1 — FEATURES. DESCRIPTIO. Up to 92% Efficiency. Generates 3.3V at 100mA from … |
| Dateiformat / Größe | PDF / 302 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. Up to 92% Efficiency. Generates 3.3V at 100mA from a Single AA Cell. Low Start-Up Voltage: 0.85V
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LTC3400-1 600mA, 1.2MHz Micropower Synchronous Boost Converter in ThinSOT
U FEATURES DESCRIPTIO
■
Up to 92% Efficiency
The LTC®3400-1 is a synchronous, fixed frequency, step- ■
Generates 3.3V at 100mA from a Single AA Cell
up DC/DC converter delivering high efficiency in a 6-lead ■
Low Start-Up Voltage: 0.85V
ThinSOT™ package. Capable of supplying 3.3V at 100mA ■
VOUT Connected to VIN in Shutdown
from a single AA cell input, the device contains an internal ■
Internal Synchronous Rectifier
NMOS switch and PMOS synchronous rectifier. ■ 2.5V to 5V Output Range A switching frequency of 1.2MHz minimizes solution ■ Automatic Burst Mode® Operation footprint by allowing the use of tiny, low profile inductors ■ Logic Controlled Shutdown (< 1µA) and ceramic capacitors. The current mode PWM design is ■ Antiringing Control Minimizes EMI internally compensated, reducing external parts count. ■ Tiny External Components The LTC3400-1 features automatic shifting to power sav- ■ Low Profile (1mm) SOT-23 Package ing Burst Mode operation at light loads. In shutdown, VOUT
U
and VIN are connected, which allows the input battery to be
APPLICATIO S
used for backup power. The LTC3400-1 features low ■ Pagers shutdown current of under 1µA. ■ MP3 Players The LTC3400-1 is offered in the low profile (1mm) ■ Digital Cameras SOT-23 package. ■ LCD Bias Supplies ■ Handheld Instruments , LTC, LT and Burst Mode are registered trademarks of Linear Technology Corporation. ■ Wireless Handsets ThinSOT is a trademark of Linear Technology Corporation. ■ GPS Receivers US Patent Numbers 5,481,178; 6,580,258; 6,304,066; 6,127,815; 6,498,466; 6,611,131.
U TYPICAL APPLICATIO Efficiency
100
Single Cell to 3.3V Synchronous Boost Converter
90 VIN = 2.4V 4.7µH + 80 V SINGLE IN = 1.5V 4.7µF AA CELL SW VOUT V V 70 IN OUT 3.3V 1.02M 100mA LTC3400-1 1% EFFICIENCY (%) 60 OFF ON SHDN FB 4.7µF GND 604k 50 FIGURE 1 CIRCUIT 1% WITH OPTIONAL SCHOTTKY DIODE (SEE APPLICATIONS INFORMATION) 40 34001 F01 0.1 1 10 100 1000 LOAD CURRENT (mA) 34001 F01a 34001f 1
U FEATURES DESCRIPTIO
■
Up to 92% Efficiency
The LTC®3400-1 is a synchronous, fixed frequency, step- ■
Generates 3.3V at 100mA from a Single AA Cell
up DC/DC converter delivering high efficiency in a 6-lead ■
Low Start-Up Voltage: 0.85V
ThinSOT™ package. Capable of supplying 3.3V at 100mA ■
VOUT Connected to VIN in Shutdown
from a single AA cell input, the device contains an internal ■
Internal Synchronous Rectifier
NMOS switch and PMOS synchronous rectifier. ■ 2.5V to 5V Output Range A switching frequency of 1.2MHz minimizes solution ■ Automatic Burst Mode® Operation footprint by allowing the use of tiny, low profile inductors ■ Logic Controlled Shutdown (< 1µA) and ceramic capacitors. The current mode PWM design is ■ Antiringing Control Minimizes EMI internally compensated, reducing external parts count. ■ Tiny External Components The LTC3400-1 features automatic shifting to power sav- ■ Low Profile (1mm) SOT-23 Package ing Burst Mode operation at light loads. In shutdown, VOUT
U
and VIN are connected, which allows the input battery to be
APPLICATIO S
used for backup power. The LTC3400-1 features low ■ Pagers shutdown current of under 1µA. ■ MP3 Players The LTC3400-1 is offered in the low profile (1mm) ■ Digital Cameras SOT-23 package. ■ LCD Bias Supplies ■ Handheld Instruments , LTC, LT and Burst Mode are registered trademarks of Linear Technology Corporation. ■ Wireless Handsets ThinSOT is a trademark of Linear Technology Corporation. ■ GPS Receivers US Patent Numbers 5,481,178; 6,580,258; 6,304,066; 6,127,815; 6,498,466; 6,611,131.
U TYPICAL APPLICATIO Efficiency
100
Single Cell to 3.3V Synchronous Boost Converter
90 VIN = 2.4V 4.7µH + 80 V SINGLE IN = 1.5V 4.7µF AA CELL SW VOUT V V 70 IN OUT 3.3V 1.02M 100mA LTC3400-1 1% EFFICIENCY (%) 60 OFF ON SHDN FB 4.7µF GND 604k 50 FIGURE 1 CIRCUIT 1% WITH OPTIONAL SCHOTTKY DIODE (SEE APPLICATIONS INFORMATION) 40 34001 F01 0.1 1 10 100 1000 LOAD CURRENT (mA) 34001 F01a 34001f 1