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LP6253 bảng dữ liệu(PDF) 4 Page - Lowpower Semiconductor inc

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LP6253 bảng dữ liệu(HTML) 4 Page - Lowpower Semiconductor inc

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Preliminary Datasheet
LP6253
LP6253 –00
Version 1.0
Sep.-2013
Email: marketing@lowpowersemi.com
www.lowpowersemi.com
Page 4 of 11
Electrical Characteristics
(Vin=3.5V,Vout=5V,Cin=22uF,Cout=22uF,L=2.2uH)
Parameter
Conditions
LP6253
Units
Min
Typ
Max
Supply Voltage
2.6
5.5
V
Output Voltage Range
2.6
5.5
V
Under voltage lockout
LP6253QVF, Vin voltage decreasing.
1.5
V
LP6253SPF, Vin voltage decreasing.
2.3
Supply Current(Shutdown)
VEN= 0V
0.05
1
uA
Supply Current
LP6253QVF,VFB=0.6V
190
uA
Feedback Voltage
LP6253QVF
0.49
0.5
0.51
V
LP6253SPF
0.784
0.8
0.816
Feedback Input Current
VFB=0.6V for LP6253QVF
50
nA
Switching Frequency
LP6253QVF
1200
1400
1600
KHz
LP6253SPF
600
800
1000
EN Input Low Voltage
0.4
V
EN Input High Voltage
1.4
V
Power mosfet Current Limit
LP6253SPF
7
A
LP6253QVF
6
A
High-side On Resistance
Vout=5V
55
mΩ
Low-side On Resistance
Vout=5V
55
mΩ
Line regulation
0.6
%
LBI voltage threshold
LP6253QVF, VLBI voltage decreasing
490
500
510
mV
LBI input hysteresis
LP6253QVF,
10
mV
LBI input current
LP6253QVF, EN = VBAT or GND
0.01
0.1
uA
LBO output low voltage
LP6253QVF, VO=3.3V
0.04
0.4
V
LBO output low current
LP6253QVF,
100
uA
LBO leakage current
LP6253QVF, VLBO = 7 V
0.01
0.1
uA
Over temperature protection
150
°C
Over temperature hysteresis
20
°C



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