Preliminary Datasheet
LP6301
1.5MHz,
1.5A Step-down Converter With Soft-Start
General Description
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.
Features
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
Order Information
LP6301 -
□ □
□ □ □
F: Pb-Free
Package Type
QV: TDFN-6
12: 1.2V
18: 1.8V
33: 3.3V
A: Adjustable
Typical Application Circuit
Applications
Portable Media Players
Cellular and Smart mobile phone
PDA/DSC
Marking Information
Please see website.
GPS Applications
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
Preliminary Datasheet
Functional Pin Description
LP6301
Pi n Desc ript ion
Pin NO
1
2
3
4
5
6
PIN
NC
EN
Vin
SW
GND1
FB
No Connect.
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).
Supply Input.
Switch Mode Connection to Inductor. This pin connects to the drains of the
internal main and synchronous power MOSFET switches.
Ground 1.
Feedback Input. Connect FB to the center point of the external resistor divider.
Normal voltage for this pin is 0.6V.
DESCRIPTION
Function Block Diagram
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
Preliminary Datasheet
Absolute Maximum Ratings
LP6301
Input Voltage to GND ------------------------------------------------------------------------------------------- 6V
SW to GND (V
SW
) ---------------------------------------------------------------------------- 0.3V to V
IN
+0.3V
FB to GND (V
FB
) ------------------------------------------------------------------------------ 0.3V to V
IN
+0.3V
EN EN_BAT to GND (V
EN
) ------------------------------------------------------------------------0.3V to 6V
Operating Junction Temperature Range (T
J
) ----------------------------------------------------40
℃
to 150
℃
Maximum Soldering Temperature (at leads, 1 0sec) ----------------------------------------------------- 260
℃
Electrical Characteristics
(V
IN
=V
EN
,Typical values are T
A
=25
℃
)
Symbol
Parameter
Conditions
LP6301
Min.
Typ.
2.5
Max.
5.5
Unit
V
%/
v
%/
v
V
µA
µA
A
Step-Down Converter
Input Voltage
V
IN
△V
OUT
△V
FB
V
OUT
I
Q
I
SHDN
I
LIM
R
DS(ON)H
R
DS(ON)L
I
LXLEAK
∆
V
Line-reg
/
∆
V
IN
Output Voltage Line Regulation
Reference Voltage
Line Regulation
Output Voltage Range
Quiescent Current
Shutdown Current
P-Channel Current Limit
High-Side Switch On Resistance
Low-Side Switch On Resistance
LX Leakage Current
Line Regulation
Feedback Threshold Voltage
Accuracy
FB Leakage Current
Oscillator Frequency
I
LOAD
= 0
V
INB
= 2.5V to 5.5V
V
INB
= 2.5V to 5.5V
0.6
V
FB1
=V
FB2
=0V,V
IN1/IN2
=4.2V
ENB = GND
1.6
0.25
0.25
0.4
0.4
V
INB
350
1
2
0.4
0.4
1
270
1.8
0.28
0.3
V
EN1/EN2
=0V,
V
SW1/SW2
=0 or 5V, V
IN1/IN2
=5V
V
INB
= 2.8V to 5.5V
V
INB
= 3.6V
V
OUTB
= 1 .0V
V
FB1
=V
FB2
=0.6V
V
FB1
=V
FB2
=0V
From Enable to Output Regulation
0.588
0.2
0.6
30
1.2
1.5
0.7
120
150
20
µA
%/V
V
nA
0.4
0.612
V
FB
I
FB
F
OSC
T
S
T
SD
T
HYS
V
EN(L)
V
EN(H)
I
EN
1.8
MHz
µs
℃
℃
Startup Time
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
0.4
0.3
1.0
1.5
1
V
V
µA
V
INB
= V
ENB
= 5.5V
-1
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
Preliminary Datasheet
Typical Operating Characteristics
LP6301
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
Preliminary Datasheet
LP6301
LP6301 – Ver. 1.0 Datasheet
Sep.-2007
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