POWER LP6301

Preliminary Datasheet
LP6301
1.5MHz, 1.5A Step-down Converter With Soft-Start
General Description
Features
The LP6301 contains a independent 1.5MHz constant
frequency, current mode, PWM step-down converters.
The converter integrates a main switch and a
synchronous rectifier for high efficiency without an
external Schottky diode. The LP6301 is ideal for
powering portable equipment that runs from a single cell
Lithium-Ion (Li+) battery. The converter can supply
1500mA of load current from a 2.5V to 5.5V input
voltage. The output voltage can be regulated as low as
0.6V. The LP6301 can also run at 100% duty cycle for
low dropout applications.
The LP6301 is available in a 16-lead 2mm*2mm DFN
package and is rated over the -40°C to 85°C temperature
range.
Order Information
LP6301 - □ □
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Input Voltage Range: 2.5V to 5.5V
Output Voltage Range: 0.6V to VIN
1500mA Load Current on Each Channel
Up to 95% Efficiency
100% Duty Cycle in Dropout
< 1 u A Quiescent Current
1.5MHz Switching Frequency
Soft star Function
Short Circuit Protection
Current Mode Operation
Thermal Fault Protection
2 m m × 2 m m TDFN-6 Package
RoHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
□ □ □
F: Pb-Free
Package Type
QV: TDFN-6
12: 1.2V
18: 1.8V
33: 3.3V
A: Adjustable
Marking Information
Applications
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Portable Media Players
Cellular and Smart mobile phone
PDA/DSC
GPS Applications
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
Please see website.
Preliminary Datasheet
Functional Pin Description
Pi n Desc ript ion
Pin NO
PIN
DESCRIPTION
1
NC
No Connect.
2
EN
Enable Control Input. Drive EN1 above 1.5V to turn on the Channel. Drive EN
below 0.3V to turn it off (shutdown current < 0.1µA).
3
4
Vin
SW
Supply Input.
Switch Mode Connection to Inductor. This pin connects to the drains of the
internal main and synchronous power MOSFET switches.
5
GND1
6
FB
Ground 1.
Feedback Input. Connect FB to the center point of the external resistor divider.
Normal voltage for this pin is 0.6V.
Function Block Diagram
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
LP6301
Preliminary Datasheet
Absolute Maximum Ratings
LP6301
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Input Voltage to GND ------------------------------------------------------------------------------------------- 6V
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SW to GND (VSW) ---------------------------------------------------------------------------- 0.3V to VIN +0.3V
FB to GND (VFB) ------------------------------------------------------------------------------ 0.3V to VIN +0.3V
EN EN_BAT to GND (VEN) ------------------------------------------------------------------------0.3V to 6V
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Operating Junction Temperature Range (TJ) ----------------------------------------------------40℃ to 150℃
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Maximum Soldering Temperature (at leads, 1 0sec) ----------------------------------------------------- 260℃
Electrical Characteristics
(VIN =VEN,Typical values are TA=25℃ )
Parameter
Symbol
Conditions
Step-Down Converter
Input Voltage
VIN
Min.
LP6301
Typ.
2.5
Max.
5.5
V
ILOAD = 0
VINB = 2.5V to 5.5V
0.25
0.4
%/v
VINB = 2.5V to 5.5V
0.25
0.4
%/v
270
VINB
350
△VOUT
Output Voltage Line Regulation
△VFB
VOUT
Reference Voltage
Line Regulation
Output Voltage Range
IQ
Quiescent Current
VFB1=VFB2=0V,VIN1/IN2=4.2V
ISHDN
ILIM
Shutdown Current
ENB = GND
RDS(ON)H
High-Side Switch On Resistance
0.28
0.4
RDS(ON)L
Low-Side Switch On Resistance
0.3
0.4
ILXLEAK
∆VLine-reg/∆VIN
VFB
IFB
VEN1/EN2=0V,
VSW1/SW2=0 or 5V, VIN1/IN2=5V
Line Regulation
Feedback Threshold Voltage
Accuracy
FB Leakage Current
VINB = 2.8V to 5.5V
VEN(L)
Startup Time
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Enable Threshold Low
VEN(H)
Enable Threshold High
IEN
Input Low Current
TSD
THYS
1.6
LX Leakage Current
FOSC
TS
0.6
P-Channel Current Limit
Oscillator Frequency
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
Unit
VINB = 3.6V
VOUTB = 1 .0V
VFB1=VFB2=0.6V
0.588
1.8
µA
1
µA
2
A
1
µA
0.2
0.4
%/V
0.6
0.612
30
1.2
V
1.5
V
nA
1.8
MHz
VFB1=VFB2=0V
0.7
From Enable to Output Regulation
120
µs
150
℃
20
℃
0.3
VINB = VENB = 5.5V
-1
1.0
0.4
V
1.5
V
1
µA
Preliminary Datasheet
Typical Operating Characteristics
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
LP6301
Preliminary Datasheet
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
LP6301
Preliminary Datasheet
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
LP6301
Preliminary Datasheet
Packaging Information
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
LP6301