Datasheet LT1610 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 1.7MHz, Single Cell Micropower DC/DC Converter |
| 页数 / 页 | 16 / 1 — FEATURES. DESCRIPTIO. Uses Tiny Capacitors and Inductor. Internally … |
| 文件格式/大小 | PDF / 224 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTIO. Uses Tiny Capacitors and Inductor. Internally Compensated. Low Quiescent Current: 30. APPLICATIO S
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LT1610 1.7MHz, Single Cell Micropower DC/DC Converter
U FEATURES DESCRIPTIO
■
Uses Tiny Capacitors and Inductor
The LT®1610 is a micropower fixed frequency DC/DC ■
Internally Compensated
converter that operates from an input voltage as low as 1V. ■
Low Quiescent Current: 30
µ
A
Intended for small, low power applications, it switches at ■ Operates with VIN as Low as 1V 1.7MHz, allowing the use of tiny capacitors and inductors. ■ 3V at 30mA from a Single Cell The device can generate 3V at 30mA from a single cell ■ 5V at 200mA from 3.3V (1V) supply. An internal compensation network can be ■ High Output Voltage Capability: Up to 28V connected to the LT1610’s V ■ Low Shutdown Current: < 1µA C pin, eliminating two exter- nal components. No-load quiescent current of the LT1610 ■ Automatic Burst ModeTM Switching at Light Load is 30µA, and the internal NPN power switch handles a ■ Low VCESAT Switch: 300mV at 300mA 300mA current with a voltage drop of 300mV. ■ 8-Lead MSOP and SO Packages The LT1610 is available in 8-lead MSOP and SO packages.
U APPLICATIO S
■ Pagers ■ Cordless Phones ■ Battery Backup ■ LCD Bias , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Portable Electronic Equipment Burst Mode is a trademark of Linear Technology Corporation.
U TYPICAL APPLICATIO
L1
Efficiency
4.7µH D1 VOUT 3V 85 30mA VOUT = 3V 6 5 R1 80 1M V V IN = 1.5V IN SW VIN = 1.25V 3 2 75 SHDN FB + + C1 R2 LT1610 C2 1 CELL 70 22µF 681k 22µF VIN = 1V 8 7 COMP GND 65 VC PGND EFFICIENCY (%) 1 4 60 55 C1, C2: AVX TAJA226M006R 1610 F01 D1: MOTOROLA MBR0520 50 L1: MURATA LQH1C4R7 0.1 1 10 100 LOAD CURRENT (mA)
Figure 1. 1-Cell to 3V Step-Up Converter
1610 TA01 1
U FEATURES DESCRIPTIO
■
Uses Tiny Capacitors and Inductor
The LT®1610 is a micropower fixed frequency DC/DC ■
Internally Compensated
converter that operates from an input voltage as low as 1V. ■
Low Quiescent Current: 30
µ
A
Intended for small, low power applications, it switches at ■ Operates with VIN as Low as 1V 1.7MHz, allowing the use of tiny capacitors and inductors. ■ 3V at 30mA from a Single Cell The device can generate 3V at 30mA from a single cell ■ 5V at 200mA from 3.3V (1V) supply. An internal compensation network can be ■ High Output Voltage Capability: Up to 28V connected to the LT1610’s V ■ Low Shutdown Current: < 1µA C pin, eliminating two exter- nal components. No-load quiescent current of the LT1610 ■ Automatic Burst ModeTM Switching at Light Load is 30µA, and the internal NPN power switch handles a ■ Low VCESAT Switch: 300mV at 300mA 300mA current with a voltage drop of 300mV. ■ 8-Lead MSOP and SO Packages The LT1610 is available in 8-lead MSOP and SO packages.
U APPLICATIO S
■ Pagers ■ Cordless Phones ■ Battery Backup ■ LCD Bias , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Portable Electronic Equipment Burst Mode is a trademark of Linear Technology Corporation.
U TYPICAL APPLICATIO
L1
Efficiency
4.7µH D1 VOUT 3V 85 30mA VOUT = 3V 6 5 R1 80 1M V V IN = 1.5V IN SW VIN = 1.25V 3 2 75 SHDN FB + + C1 R2 LT1610 C2 1 CELL 70 22µF 681k 22µF VIN = 1V 8 7 COMP GND 65 VC PGND EFFICIENCY (%) 1 4 60 55 C1, C2: AVX TAJA226M006R 1610 F01 D1: MOTOROLA MBR0520 50 L1: MURATA LQH1C4R7 0.1 1 10 100 LOAD CURRENT (mA)
Figure 1. 1-Cell to 3V Step-Up Converter
1610 TA01 1