POWER LP2201 200ma,dual channel ultra-fast cmos ldo regulator Datasheet

Preliminary
Datasheet
LP2201
200mA,Dual Channel Ultra-Fast CMOS LDO Regulator
General Description
Features
The LP2201 is a dual channel, low noise, and low
dropout regulator sourcing up to 250mA at each
channel. The range of output voltage is from 1.2V to
3.6V by operating from 2.5V to 5.5V input.
Wide Operating Voltage Ranges : 2.5V to 5.5V 
Low-Noise for RF Application
High PSRR 65dB at 1kHz
No Noise Bypass Capacitor Required 
LP2201 offers 2% accuracy, extremely low dropout
voltage (80mV @ 150mA), and extremely low ground
current, only 25µA per LDO. The shutdown current is
near zero current which is suitable for battery-power
devices. Other features include current limiting, over
temperature, output short circuit protection.
Fast Response in Line/Load Transient
LP2201 is short circuit thermal folded back protected.
LP2201 lowers its OTP trip point from 165°C to
110°C when output short circuit occurs (VOUT <
0.4V) providing maximum safety to end users.
Thermal Shutdown Protection
LP2201 can operate stably with very small ceramic
output capacitors, reducing required board space and
component cost. LP2201 is available in fixed output
voltages in the SOT-23-6 package.
Ordering Information
□□ □□
LP2201 -
□
F: Pb-Free
Package Type
B6: SOT23-6
Out1/Out2 Voltage Type
18/28: 1.8V/2.8V
18/33: 1.8V/3.3V
25/28: 2.5V/2.8V
28/28: 2.8V/2.8V
28/12: 2.8V/1.2V
28/33: 2.8V/3.3V
30/30: 3.0V/3.0V
30/33: 3.0V/3.3V
33/33: 3.3V/3.3V
TTL-Logic-Controlled Shutdown Input
Dual LDO Outputs (200mA/200mA)
High Output Accuracy 2%
Ultra-low Quiescent Current 27uA
Thermal Shutdown Protection
Tiny SOT-23-6 Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
CDMA/GSM Cellular Handsets
Smart mobile phone
Battery-Powered Equipment
DSC Sensor
Wireless Card
Pin Configurations
SOT23-6 (Top View)
Typical Application Circuit
VIN
1uF
Chip Enable
2
LP2201
Vin
Vout2
4
VOUT2
Please see website.
1uF
1
3
EN1
Vout1
EN2
GND
LP2201 – Ver. 1.2Datasheet
VOUT1
6
5
Jul.-2008
Marking Information
1uF
Page 1 of 8
Preliminary
Datasheet
LP2201
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
EN1
Chip Enable1 (Active High)
2
VIN
Supply Input
3
EN2
Chip Enable2 (Active High)
4
VOUT2
Channel 2 Output Voltage
5
GND
Common Ground
6
VOUT1
Channel 1 Output Voltage
Function Block Diagram
LP2201 – Ver. 1.2Datasheet
Jul.-2008
Page 2 of 8
Preliminary
Absolute Maximum Ratings
Datasheet
LP2201
Supply Input Voltage------------------------------------------------------------------------------------------------------6V
Power Dissipation, PD @ TA = 25°C
SOT23-6 ----------------------------------------------------------------------------------------------------455mW
Package Thermal Resistance
SOT23-6, θJA ----------------------------------------------------------------------------------------------------------220°C/W
Lead Temperature (Soldering, 10 sec.) -----------------------------------------------------------------------------260°C
Storage Temperature Range ----------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility
HBM (Human Body Mode) -------------------------------------------------------------------------------------------2kV
MM(Machine-Mode)-----------------------------------------------------------------------------------------------------200V
Recommended Operating Conditions
Operation Junction Temperature Range -----------------------------------------------------------−40°C to 125°C
Operation Ambient TemperatureRange---------------------------------------------------------------−40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1µF, TA = 25° C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Output Voltage Accuracy
ΔVOUT
IOUT = 1mA
−2
--
+2
%
Maximum output Current
Imax
Continuous
150
250
Current Limit
ILIM
RLOAD = 1Ω
360
400
700
mA
Quiescent Current
IQ
VEN ≥ 1.2V, IOUT = 0mA
75
110
μA
30
45
IOUT = 30mA, VOUT >
Dropout Voltage
VDROP
2.8V
mV
IOUT = 150mA, VOUT >
80
2.8V
VIN = (VOUT + 1V) to
Line Regulation
ΔVLINE
Load Regulation
ΔLOAD
1mA < IOUT < 300mA
Standby Current
ISTBY
VEN = GND, Shutdown
EN Input Bias Current
IIBSD
VEN = GND or VIN
Logic-Low
EN Threshold
VIL
Voltage
Logic-High
Voltage
VIH
Power Supply
Rejection Rate
200mA COUT = 1µF
f = 100Hz
COUT = 1µF,
Jul.-2008
TSD
%
0.01
1
μA
0
100
nA
0.4
V
1.2
100
uVRMS
−75
IOUT = 10mA
Thermal Shutdown Temperature
LP2201 – Ver. 1.2Datasheet
PSRR
f = 10kHz
0.6
Shutdown
10Hz to 100kHz, IOUT =
Output Noise Voltage
%
VIN = 3V to 5.5V,
Start-Up
150
0.3
5.5V, IOUT = 1mA
VIN = 3V to 5.5V,
mA
−65
165
dB
°C
Page 3 of 8
Preliminary
Datasheet
LP2201
Typical Operating Characteristics
LP2201 – Ver. 1.2Datasheet
Jul.-2008
Page 4 of 8
Preliminary
LP2201 – Ver. 1.2Datasheet
Jul.-2008
Datasheet
LP2201
Page 5 of 8
Preliminary Datasheet
LP2201
Start-up Function Enable Function
Applications Information
Like any low-dropout regulator, the external capacitors
used with the LP2201 must be carefully selected for
regulator stability and performance. Using a capacitor
whose value is > 1µF on the LP2201 input and the
amount of capacitance can be increased without limit.
The input capacitor must be located a distance of not
more than 0.5 inch from the input pin of the IC and
returned to a clean analog ground. Any good quality
ceramic or tantalum can be used for this capacitor. The
The LP2201 features an LDO regulator enable/disable
capacitor with larger value and lower ESR (equivalent
function. To assure the LDO regulator will switch on, the
series
and
EN turn on control level must be greater than 1.2 volts.
line-transient response. The output capacitor must meet
The LDO regulator will go into the shutdown mode when
both requirements for minimum amount of capacitance
the voltage on the EN pin falls below 0.4 volts. For to
and ESR in all LDOs application. The LP2201 is designed
protecting
specifically to work with low ESR ceramic output
quick-discharge function. If the enable function is not
capacitor in space-saving and performance consideration.
needed in a specific application, it may be tied to VIN to
Using a ceramic capacitor whose value is at least 1µF
keep the LDO regulator in a continuously on state.
with ESR is > 25mΩ on the LP2201 output ensures
Thermal Considerations
stability. The LP2201 still works well with output capacitor
Thermal protection limits power dissipation in LP2201.
of other types due to the wide stable ESR range. Figure 1
When the operation junction temperature exceeds 165°C,
shows the curves of allowable ESR range as a function of
the OTP circuit starts the thermal shutdown function turn
load current for various output capacitor values. Output
the pass element off. The pass element turn on again
capacitor of larger capacitance can reduce noise and
after the junction temperature cools by 30°C. For continue
improve load transient response, stability, and PSRR.
operation, do not exceed absolute maximum operation
The output capacitor should be located not more than 0.5
junction temperature 125°C.
inch from the VOUT pin of the LP2201 and returned to a
The power dissipation definition in device is :
resistance)
provides
better
PSRR
the
system,
the
LP2201
have
a
PD = (VIN−VOUT) x IOUT + VIN x IQ
clean analog ground.
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient.
The maximum power dissipation can be calculated by
following formula :
PD(MAX) = ( TJ(MAX) − TA ) /θJA
Where TJ(MAX) is the maximum operation junction
LP2201 – Ver. 1.2Datasheet
Jul.-2008
Page 6 of 8
Preliminary Datasheet
LP2201
temperature 125°C, TA is the ambient temperature and
the θJA is the junction to ambient thermal resistance. For
recommended
operating
conditions specification
of
LP2201, where TJ(MAX) is the maximum junction
temperature of the die (125°C) and TA is the maximum
ambient temperature. The junction to ambient thermal
resistance (θJA is layout dependent) for SOT23-6
package is 250°C/W.
PD(MAX) = (125°C−25°C) / 250 = 400mW (SOT23-6)
PD(MAX) = (125°C−25°C) / 165 = 606mW
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA.
LP2201 – Ver. 1.2Datasheet
Jul.-2008
Page 7 of 8
Preliminary
Datasheet
LP2201
Packaging Information
LP2201 – Ver. 1.2Datasheet
Jul.-2008
Page 8 of 8
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