LP6217 Datasheet, PDF (1/6 Pages) Lowpower Semiconductor inc – 1MHz fixed frequency switching

Preliminary
LP6217
26V/2.1A Current Boost With OCP IN SOT23-6 Package
General Description
The LP6217 is high efficiency Boost DC/DC
Converter, fixed frequency, current-mode step-up
converter with output to input disconnect. A PWM
step-up DC/DC converters optimized to provide a
high efficiency solution to medium power system.
Its PWM circuitry with built-in 2.1A@200mΩ
power mosfet makes this converter highly power
efficiently. Selectable high switching frequency
allows faster loop response and easy filtering with a
low noise output. The non-inverting input its error
amplifier is connected to an internal 0.6V precision
reference voltage. Soft-start time can be
programmed with an external capacitor, which sets
the input current ramp rate. Current mode control
and external compensation network make it easy
and flexible to stabilize the system. the devices
regulates the output voltage up to 12V from either a
2cell NiMH/NiCd or a single-cell Li-ion Battery
with a 1MHz fixed frequency switching. These
features minimize overall solution footprint by
allowing the use of tiny, low profile inductors and
ceramic capacitors.
Ordering Information
LP6217 - □ □ □
F: Pb-Free
Package Type
B6: SOT23-6
Marking Information
Please see website.
Features
— Up to 94% efficiency
— Shut-down current:<1uA 
— Output voltage Up to 24V
— 1MHz fixed frequency switching
— High switch on current:2.1A,24V@200mΩ
— Adjustable OCP: 0.5A-2A
— Available in SOT23-6 Package 　
Applications
— Battery products
— Host Products
— Motor Power Devices
Typical Application Circuit
Vin
Vout
C1
22uF
4.7uH
LP6217
1 _Vin
C2
22uF
C3
R1
22pF
45K
FB ⁶
5 _EN
OCP ³
R2
10K
R3
20K
Pin Configurations
6
5
4
LP6217B6F
1
2
3
(SOT23-6)
LP6217 –00 Version 1.0 Datasheet Sep.-2010
www.lowpowersemi.com
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