Preliminary Datasheet
LP6253
High Efficiency 7A Synchronous Boost Convertor
General Description
The LP6253 is a synchronous current mode boost
DC-DC converter. Its PWM circuitry with built-in
7A(ESOP8) current power MOSFET makes this
converter highly efficient. 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
0.5V(TQFN-16)/0.8V(ESOP8)
voltage.
Current
mode
precision
control
and
reference
internal
Features
Up to 96% efficiency
Output to Input Disconnect at Shutdown Mode
Shut-down current:<1uA
Output voltage Up to 5.0V/3A(ESOP8)
Internal Compensation
1.4MHz(TQFN-16) & 800KHz(ESOP8)fixed
frequency switching
High switch on current:7A for LP6253SPF
6A for LP6253QVF
Available in ESOP8 and TQFN-16 Package
compensation network make it easy and flexible to
stabilize the system.
Applications
Battery products
Host Products
Panel
Ordering Information
LP6253
□ □
□
Pin Configurations
F: Pb-Free
Package Type
SP: ESOP8
QV: TQFN-16
LX
PG
3
4
ILIM
EN
1
2
8
7
6
5
GND
FB
VOUT
VIN
9
PGND
ESOP8
Typical Application Circuit
LBO
16
EN MODE LBI
15
14
13
12
FB
VOUT
VOUT
VOUT
1
VIN
GND
GND
GND
2
11
GND
3
10
TQFN-16
4
5
6
7
8
9
LX
LX
LX
LX
LP6253QVF
Marking Information
Device
LP6253SPF
LP6253QVF
Marking
LPS
LP6253
YWX
Package
ESOP8
TQFN-16
Shipping
3K/REEL
Y: Year code. W: Week code. X: Batch numbers.
LP6253 –00
Version 1.0
Sep.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 11
Preliminary Datasheet
Functional Pin Description
ESOP8
7
6
3
8,9
5
TQFN-16
1
2,3,4
5,6,7,8
9,10,11
12
13
14
2
15
16
4
1
PIN Name
FB
VOUT
LX
GND
VIN
LBI
MODE
EN
LBO
PG
ILIM
Feedback pin.
Output pin.
Switching pin.
Ground pin.
Voltage input pin.
Battery detector input pin.
Enable power save mode. Low voltage active.
Chip enable pin.
Open_drain low battery detector output pin.
Description
LP6253
Indication of power good. It is high resistance when
VIN=0V, and connecting to ground when VIN>3V.
By connection a resistor to ground, set the input
current limit.
Function Block Diagram
(for
LP6253QVF)
LP6253 –00
Version 1.0
Sep.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 2 of 11
Preliminary Datasheet
Absolute Maximum Ratings
LP6253
Supply Input Voltage---------------------------------------------------------------------------------------------------------------7V
Power Dissipation, P
D
@ T
A
= 25°C
ESOP8 ---------------------------------------------------------------------------------------------------------------------------- 1.5W
TQFN-16 -------------------------------------------------------------------------------------------------------------------------- 1.5W
Package Thermal Resistance
ESOP8, θ
JA
------------------------------------------------------------------------------------------------------------------ 46°C/W
TQFN-16, θ
JA
---------------------------------------------------------------------------------------------------------------- 45°C/W
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------------260°C
Recommended Operating Conditions
Supply Input Voltage---------------------------------------------------------------------------------------------------2.6V to 5.5V
EN Input Voltage --------------------------------------------------------------------------------------------- -0.3V to VIN+0.3V
Operation Junction Temperature Range -------------------------------------------------------------------- −40°C to 125°C
Operation Ambient Temperature Range----------------------------------------------------------------------- −40°C to 85°C
LP6253 –00
Version 1.0
Sep.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 3 of 11
Preliminary Datasheet
Electrical Characteristics
(Vin=3.5V,Vout=5V,Cin=22uF,Cout=22uF,L=2.2uH)
Parameter
Supply Voltage
Output Voltage Range
Under voltage lockout
Supply Current(Shutdown)
Supply Current
Feedback Voltage
Feedback Input Current
Switching Frequency
EN Input Low Voltage
EN Input High Voltage
Power mosfet Current Limit
High-side On Resistance
Low-side On Resistance
Line regulation
LBI voltage threshold
LBI input hysteresis
LBI input current
LBO output low voltage
LBO output low current
LBO leakage current
Over temperature protection
Over temperature hysteresis
LP6253QVF, VLBI voltage decreasing
LP6253QVF,
LP6253QVF, EN = VBAT or GND
LP6253QVF, VO=3.3V
LP6253QVF,
LP6253QVF, VLBO = 7 V
490
500
10
0.01
0.04
100
0.01
150
20
LP6253SPF
LP6253QVF
Vout=5V
Vout=5V
1.4
7
6
55
55
LP6253QVF, Vin voltage decreasing.
LP6253SPF, Vin voltage decreasing.
VEN= 0V
LP6253QVF,VFB=0.6V
LP6253QVF
LP6253SPF
VFB=0.6V for LP6253QVF
LP6253QVF
LP6253SPF
1200
600
0.49
0.784
Conditions
LP6253
Min
2.6
2.6
1.5
2.3
0.05
190
0.5
0.8
50
1400
800
Typ
LP6253
Max
5.5
5.5
Units
V
V
V
1
uA
uA
0.51
0.816
V
nA
1600
1000
0.4
KHz
V
V
A
A
mΩ
mΩ
0.6
510
%
mV
mV
0.1
0.4
uA
V
uA
0.1
uA
°C
°C
LP6253 –00
Version 1.0
Sep.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 4 of 11
Preliminary Datasheet
Typical Operating Characteristics(
for LP6253QVF
)
(VIN=3.3V
Vout=5V
L=2.2uH
Cin=22uF
Cout=22uF)
LP6253
CH1=Vout, CH2=Vin,
I
LOAD
=500mA
CH3=SW
CH1=Vout, CH2=Vin, CH3=SW
I
LOAD
=1000mA
CH1=Vout, CH2=Vin,
I
LOAD
=2000mA
CH3=SW
CH1=Vout, CH2=Vin,
I
LOAD
=2500mA
CH3=SW
CH1=Vout,
LP6253 –00
CH2=EN,
I
LOAD
= 10mA
Vin=3.3V,
Vout=5V, I
LOAD
=10mA—200mA
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Page 5 of 11
Version 1.0
Sep.-2013
Email:
marketing@lowpowersemi.com
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