LP6342 Datasheet, PDF (1/15 Pages) Lowpower Semiconductor inc – Output Voltage Range: 0.6V to VIN

Preliminary Datasheet
LP6342
1.5MHz, 2A Step-down Converter
General Description
The LP6342 is a 1.5MHz constant frequency current
mode PWM step-down converter. It is ideal for portable
equipment requiring very high current up to 2A from
single-cell Lithium-ion batteries while still achieving
over 90% efficiency during peak load conditions. The
LP6342 also can run at 100% duty cycle for low dropout
operation, extending battery life in portable systems
while light load operation provides very low output
ripple for noise sensitive applications.
The LP6342 can supply up to 2A output load current
from a 2.5V to 5.5V input voltage and the output voltage
can be regulated as low as 0.6V. The high switching
frequency minimizes the size of external components
while keeping switching losses low. The internal slope
compensation setting allows the device to operate with
smaller inductor values to optimize size and provide
efficient operation.
The LP6342 is available with adjustable (0.6V to VIN)
output voltage. The device is available in a Pb-free, 3mm
x 3mm 10-lead TDFN or MSOP-10,SOP8(EP) package
and is rated over the-40°C to +85°C temperature range.
Order Information
LP6342 □ □ □
F: Pb-Free
Package Type
QV: TDFN-10
MS: MSOP-10
SP:SOP8(EP)
Features
— Input Voltage Range: 2.5V to 5.5V
— Output Voltage Range: 0.6V to VIN
— 2A Output Current
— Low R(DSON) Internal Switches:130mΩ
— High Efficiency :Up to 95%
— 100% Duty Cycle in Dropout
— Low Shutdown Current: < 1 u A
— 1.5MHz Switching Frequency
— Soft star Function
— Short Circuit Protection
— Thermal Fault Protection
— 3 m m × 3 m m TDFN-10 or MSOP-10,SOP8(EP)
Package
— RoHS Compliant and 100% Lead (Pb)-Free
Applications
— Portable Instruments
— DSP Core Supplies
— Cellular Phone and Smart mobile phone
— PDA
— GPS Applications
Marking Information
Please see website:www.lowpowersemi.com.
Typical Application Circuit
VIN
C1
10uF
2 _Vin LP6342 _SW 7
3
Vin
8
SW
L1
2.2uH
1 _EN
FB ⁵
Vout=(R1/R2+1)*VFB
Vout_2A
R1
C2
22uF
R2
LP6342-03 Version 1.3 Datasheet Oct.-2011
www.lowpowersemi.com
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