Preliminary Datasheet
LP5305
Over Voltage and Over Current Protection IC
General Description
The LP5305 is a highly integrated circuits, it used to
protect low voltage system from abnormal high input
voltage. The IC continuously check the input voltage,
the input current, and the battery voltage. When the
protection status is occur, the power MOS will turn off
at the same time. The LP5305 is safety devices to
ensure worked against accidents.
In case of the input voltage exceeds a OVP threshold
voltage level, the power MOS will turn off within 1μs.
The current limit can is adjustable by external resistor
between ISET and GND. And the current is also
limited to prevent charging the battery with an
excessive current. The LP5305 also monitors the
Li-ion battery voltage, when the battery voltage
exceeds 4.35V, the IC will turn off the MOS.
Other features include over temperature protection
and under-voltage lockout (UVLO). The LP5305
is available in a space saving DFN-8 package.
Features
Withstand High Input Voltage Up to 26V
Adjustable Over Current Protection
Input Over Voltage Protection
Battery Over Voltage Protection
High Accuracy Protection Thresholds
Fault Signal Output
Enable Control
Under Voltage Lockout
Output Short-Circuit Protection
Over-Temperature Protection
Available in DFN-8
RoHS Compliant and Halogen Free
Applications
Cell Phones
Digital Cameras
Portable Instruments
Order Information
LP5305
□□□
F: Green
Package Type
QV: DFN-8
Marking Information
Device
LP5305
Marking
LPS
LP5305
YWX
Y: Y is year code. W: W is week code. X: X is series number.
Package
DFN-8
Shipping
3K/REEL
LP5305 Version 0.2 JUN.-2018
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 8
Preliminary Datasheet
Typical Application Circuit
VBUS
LP5305
VIN
C
in
VOUT
C
OUT
R
PU
VOUT
VDD
LP5305
EN
Fault
BAT
Fault
R
BAT
H/L
ISET GND
R
SET
Battery
Figure 1. Typical Application Circuit of LP5305 .
Pin Configuration
VIN
GND
NC
Fault
1
2
3
4
Exposed
Pad
8
7
6
5
VOUT
ISET
BAT
EN
Figure 2. Package Top View
LP5305 Version 0.2 JUN.-2018
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 2 of 8
Preliminary Datasheet
Function Block Diagram
VIN
VOUT
LP5305
Driver
Switch
UVLO
BAT
EN
OCP
ISET
OTP
OSC
Fault
OVP
Control
Logic
GND
Fault
Figure 3. Function Block Diagram
Functional Pin Description
Pin NO.
VIN
GND
NC
Fault
EN
BAT
ISET
VOUT
DFN8
1
2
3
4
5
6
7
8
EP
Description
Power source input.
Connect a ceramic capacitor between VIN and GND.
Ground.
No connect.
Fault output pin. Open-drain output, device status.
Enable pin.
Battery voltage detector input.
OCP level setting by an external resistor to GND.
Output through the power MOSFET.
Exposed pad. Connect EP to GND is suggested.
LP5305 Version 0.2 JUN.-2018
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 3 of 8
Preliminary Datasheet
Absolute Maximum Ratings
Note1
LP5305
VIN to GND -------------------------------------------------------------------------------------------------------- -0.3V to +30V
VOUT to GND ---------------------------------------------------------------------------------------------------- -0.3V to +7V
All Other Pin to GND -------------------------------------------------------------------------------------------- -0.3V to +7V
Operating Junction Temperature Range (T
J
) -------------------------------------------------------- -40℃ to 150℃
Operation Ambient Temperature Range ------------------------------------------------------------- -40°C to +105°C
Storage Temperature Range
---------------------------------------------------------------------------- -65°C to +150°C
----------------------------------------------- +260°C
Maximum Soldering Temperature (at leads, 10sec)
Note1.
Stresses
beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress
ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of
the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Thermal Information
Thermal Resistance
DFN-8,
θ
JA
-------------------------------------------------------------------------------------------------------------- 76.11
°C/W
Recommended Operating Conditions
Input Voltage, V
IN
------------------------------------------------------------------------------------------------- 3.3V to 5V
Output Current, I
OUT
--------------------------------------------------------------------------------------------- 0.3A to 1.5A
OCP Set Resistance, R
SET
------------------------------------------------------------------------------------ 15kΩ to 90kΩ
Junction Temperature, T
J
-------------------------------------------------------------------------------------- -40°C to 125°C
LP5305 Version 0.2 JUN.-2018
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 4 of 8
Preliminary Datasheet
Electrical Characteristics
(V
IN
= 5V, T
A
= 25°C, Unless Otherwise Specified)
LP5305
Parameter
General Function
Power Source Voltage
Input UVLO Threshold
UVLO Threshold Hysteresis
Power On Deglitch Time
Soft Start Time
Power Source Current
Shutdown Current
Thermal Shutdown Threshold
Thermal Shutdown Threshold
Hysteresis
Logic Function
EN Threshold Voltage
EN Input Resistance to GND
FAULT Output Logic Low
FAULT Logic High Leakage Current
Power MOS
Switch On Resistance
Regulation Function
Output Voltage Regulation
Protection Functions
Input Over Voltage Protect threshold
Input OVP threshold Hysteresis
Input OVP Recovery Delay Time
Over Current Protection
OCP Blanking Time
Over Current Recover Delay
Battery Voltage OVP
Battery OVP Hysteresis
Battery OVP Blanking Time
BAT Pin Leakage Current
Symbol
Test Conditions
Min
Typ
Max
Units
V
IN
V
UVLO
ΔV
UVLO
T
Deglitch
T
SS
I
IN
I
SD
T
SD
ΔT
SD
T
J
= +25 °C
V
IN
Rising
Falling Hysteresis
3.3
2.5
5
2.7
200
8
8.2
26
2.9
V
V
mV
ms
ms
µA
uA
°C
°C
V
IN
=5V, EN=L
V
IN
=5V, EN=H
400
55
140
20
V
ENH
V
ENL
I
EN
EN=2V
Sink 5mA
Fault=5V
1.4
0.4
15
0.2
10
V
V
uA
V
uA
R
DS(ON)
I
OUT
=1A
160
250
mΩ
V
LDO
V
IN
=5.7V
5.5
V
V
IOVP
ΔV
IOVP
T
OVPR
I
OCP
T
OCP
T
OCR
V
BOVP
ΔV
BOVP
T
BOVP
I
BAT
V
IN
from 5V to 10V
V
IN
from 10V to 5V
5.85
100
8.2
V
mV
ms
A
us
ms
V
V
us
10
nA
R
SET
= 24.9K,
3.3V<V
IN
<V
IOVP
1
200
65
V
IN
=5V
V
IN
=5V
V
IN
=5V
V
IN
=5V, V
BAT
=4.4V
4.35
0.275
200
LP5305 Version 0.2 JUN.-2018
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 5 of 8
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