Catalyst CAT6218-320TD-GT3 300ma cmos ldo regulator Datasheet

CAT6218
300mA CMOS LDO Regulator
FEATURES
DESCRIPTION
„ Guaranteed 300mA output current
The CAT6218 is a 300mA CMOS low dropout
regulator that provides fast response time during load
current and line voltage changes.
„ Low dropout voltage of 180mV typical at 300mA
„ Stable with 1μF ceramic output capacitor
The quick-start feature allows the use of an external
bypass capacitor to reduce the overall output noise
without affecting the turn-on time of just 150μs.
„ External 10nF bypass capacitor for low noise
„ Quick-start feature
With zero shutdown current and low ground current of
55μA typical, the CAT6218 is ideal for batteryoperated devices with supply voltages from 2.3V to
5.5V. An internal under voltage lockout circuit disables
the output at supply voltages under 2.1V typical.
„ No-load ground current of 55μA typical
„ Full-load ground current of 80μA typical
„ ±1.0% output voltage initial accuracy
„ ±2.0% accuracy over temperature
The CAT6218 offers 1% initial accuracy and low
dropout voltage, 180mV typical at 300mA. Stable
operation is provided with a small value ceramic
capacitor, reducing required board space and compo–
nent cost.
„ “Zero” current shutdown mode
„ Fold-back current limit and under-voltage
lockout
„ Thermal protection
„ Thin SOT23-5 package
Other features include fold-back current current limit
and thermal protection.
APPLICATIONS
The device is available in the low profile (1mm max
height) 5-lead thin SOT23 package.
„ Cellular phones
„ Battery-powered devices
„ Consumer Electronics
For Ordering Information details, see page 9.
PIN CONFIGURATION
TYPICAL APPLICATION CIRCUIT
TSOT-23 5-Lead
(1mm height)
VIN 1
VIN
2.3V
to 5.5V
5 VOUT
GND 2
4 BYP
EN 3
OFF ON
Top View
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
CIN
1µF
VIN
VOUT
CAT6218
EN
BYP
GND
VOUT
COUT
1µF
CBYP (Optional)
10nF
Doc. No. MD-4010 Rev. A
CAT6218
PIN DESCRIPTIONS
BLOCK DIAGRAM
Pin # Name Function
1
VIN Supply voltage input.
2
GND Ground reference.
Enable input (active high); a 2.5MΩ
3
EN
pull-down resistor is provided.
Optional bypass capacitor connection
4
BYP for noise reduction and PSRR
enhancing.
5 VOUT LDO Output Voltage.
VIN
VIN
VOUT
LDO
EN
BYP
Reference
VOUT
Shutdown
Switch
GND
Figure 2. CAT6218 Functional Block Diagram
PIN FUNCTION
VIN is the supply pin for the LDO. A small 1μF
ceramic bypass capacitor is required between the VIN
pin and ground near the device. When using longer
connections to the power supply, CIN value can be
increased without limit. The operating input voltage
range is from 2.3V to 5.5V.
The capacitor should be located near the device. ESR
domain is 5mΩ to 500mΩ. VOUT can deliver a maximum guaranteed current of 300mA. For input-tooutput voltages higher than 1V, a continuous 300mA
output current might turn-on the thermal protection. A
250Ω internal shutdown switch discharges the output
capacitor in the no-load condition.
EN is the enable control logic (active high) for the regulator output. It has a 2.5MΩ pull-down resistor, which
assures that if EN pin is left open, the circuit is disabled.
GND is the ground reference for the LDO. The pin
must be connected to the ground plane on the PCB.
VOUT is the LDO regulator output. A small 1μF ceramic bypass capacitor is required between the VOUT pin
and ground for stability. For better transient response,
its value can be increased to 4.7μF.
BYP is the reference bypass pin. An optional 0.01μF
capacitor can be connected between BYP pin and
GND to reduce the output noise and enhance the
PSRR at high frequency.
ABSOLUTE MAXIMUM RATINGS (1)
Parameter
VIN
VEN, VOUT
Junction Temperature, TJ
Power Dissipation, PD
Storage Temperature Range, TS
Lead Temperature (soldering, 5 sec.)
ESD Rating (Human Body Model)
Rating
0 to 6.5
-0.3 to VIN + 0.3
+150
Internally Limited (2)
-65 to +150
260
3
Unit
V
V
°C
mW
°C
°C
kV
RECOMMENDED OPERATING CONDITIONS (3)
Parameter
VIN
VEN
Junction Temperature Range, TJ
Package Thermal Resistance (SOT23-5), θJA
Range
2.3 to 5.5
0 to VIN
-40 to +125
235
Unit
V
V
°C
°C/W
Typical application circuit with external components is shown on page 1.
Notes:
(1) Exceeding maximum rating may damage the device
(2) The maximum allowable power dissipation at any TA (ambient temperature) is PDmax = (TJmax – TA)/θJA. Exceeding the maximum allowable
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
(3) The device is not guaranteed to work outside its operating rating.
Doc. No. MD-4010 Rev. A
2
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT6218
ELECTRICAL OPERATING CHARACTERISTICS (1)
VIN = VOUT + 1.0V, VEN = High, IOUT = 100μA, CIN = COUT = 1µF, ambient temperature of 25ºC (over recommended
operating conditions unless specified otherwise). Bold numbers apply for the entire junction temperature range.
Symbol Parameter
Conditions
VOUT-ACC
Initial accuracy
Output Voltage Accuracy
TCOUT
Output Voltage Temp. Coefficient
VR-LINE
Line Regulation
VIN = VOUT + 1.0V to 5.5V
VR-LOAD
Load Regulation
IOUT = 100μA to 300 mA
VDROP
Dropout Voltage (2)
IOUT = 300mA
IGND
Min
+1.0
-2.0
+2.0
40
-0.2
Shutdown Ground Current
PSRR
Power Supply Rejection Ratio
ISC
TON
±0.1
-0.4
+0.2
1.2
1.5
180
250
300
55
Unit
%
ppm/ºC
+0.4
0.7
%/V
%
mV
75
90
IOUT = 300mA
IGND-SD
Max
-1.0
IOUT = 0μA
Ground Current
Typ
μA
80
1
VEN < 0.4V
2
μA
f = 1kHz, CBYP = 10nF
64
f = 20kHz, CBYP = 10nF
54
Output short circuit current limit
VOUT = 0V
180
mA
Turn-On Time
CBYP = 10nF
150
μs
BW = 10Hz to 100kHz
45
μVrms
Shutdown Switch Resistance
250
Ω
Enable pull-down resistor
2.5
MΩ
VUVLO
Under-voltage lock out (UVLO)
threshold
2.1
V
ESR
COUT equivalent series resistance
eN
ROUT-SH
REN
Output Noise Voltage
(3)
5
dB
500
mΩ
Enable Input
VHI
Logic High Level
VIN = 2.3 to 5.5V
VLO
Logic Low Level
VIN = 2.3 to 5.5V
IEN
Enable Input Current
V
1.8
0.4
VEN = 0.4V
0.15
1
VEN = VIN
1.5
4
V
μA
Thermal Protection
TSD
Thermal Shutdown
160
ºC
THYS
Thermal Hysteresis
10
ºC
Notes:
(1 Specification for 2.85V output version unless specified otherwise.
(2) Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at
1V differential. During test, the input voltage stays always above the minimum 2.3V.
(3) Specification for 1.8V output version.
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
3
Doc. No. MD-4010 Rev. A
CAT6218
TYPICAL CHARACTERISTICS (shown for 2.85V output version)
VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified.
Line Regulation
Dropout Characteristics
3.0
2.87
2.5
OUTPUT VOLTAGE [V]
OUTPUT VOLTAGE [V]
100μA
2.0
300mA
1.5
1.0
0.5
0.0
1.0
2.0 3.0 4.0 5.0
INPUT VOLTAGE [V]
2.84
2.83
2.5
6.0
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
5.5
Output Voltage vs. Temperature
Load Regulation
2.95
2.87
OUTPUT VOLTAGE [V]
OUTPUT VOLTAGE [V]
2.85
2.82
0.0
2.90
2.85
2.80
2.75
0
2.86
2.85
2.84
2.83
2.82
50 100 150 200 250 300
OUTPUT LOAD CURRENT [mA]
-40
Ground Current vs. Load Current
-10 20 50 80 110 140
TEMPERATURE [°C]
Ground Current vs. Temperature
100
65
GROUND CURRENT [μA]
GROUND CURRENT [μA]
2.86
90
80
70
60
50
60
55
50
45
0
Doc. No. MD-4010 Rev. A
25
50 75 100 125 150
OUTPUT LOAD CURRENT [mA]
-40
4
-10
20
50
80 110 140
TEMPERATURE [°C]
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT6218
TYPICAL CHARACTERISTICS (shown for 2.85V output option)
VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified.
Ground Current vs. Input Voltage
3.0
70
2.5
60
GROUND CURRENT [μA]
OUTPUT VOLTAGE [V]
Output Voltage vs. Load Current
2.0
1.5
1.0
0.5
50
40
30
20
10
0
0.0
0
0.0
100 200 300 400 500 600 700
OUTPUT LOAD CURRENT [mA]
Dropout vs. Temperature (300mA Load)
6.0
300
DROPOUT VOLTAGE [mV]
DROPOUT VOLTAGE [mV]
2.0 3.0 4.0 5.0
INPUT VOLTAGE [V]
Dropout vs. Load Current
350
300
250
200
150
100
-40
250
200
150
100
50
0
-10 20
50 80 110 140
TEMPERATURE [°C]
0
50 100 150 200 250 300
OUTPUT LOAD CURRENT [mA]
PSRR vs. Frequency (10mA Load)
Enable Threshold vs. Input Voltage
1.6
80
CBY P = 10nF
70
60
1.2
PSRR [dB]
ENABLE THRESHOLD [V]
1.0
0.8
0.4
50
40
CBY P = 0
30
20
10
0.0
0
0.01
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE [V]
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
0.1
1
10
FREQUENCY [kHz]
100
Doc. No. MD-4010 Rev. A
CAT6218
TYPICAL CHARACTERISTICS (shown for 2.85V output option)
VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified.
PSRR (200mA Load)
PSRR (30mA Load)
70
70
1kHz
60
10kHz
50
1kHz
50
PSRR [dB]
PSRR [dB]
10kHz
60
40
30
100kHz
40
30
20
20
10
10
0
100kHz
0
0
Doc. No. MD-4010 Rev. A
100
200
300
400
VIN - VOUT [mV]
500
0
6
100
200
300
400
VIN - VOUT [mV]
500
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT6218
TRANSIENT CHARACTERISTICS (shown for 2.85V output option)
VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified.
Note: All transient characteristics are generated using the evaluation board CAT621XEVAL1.
Enable Turn-On (100μA Load)
Enable Turn-Off (100μA Load)
Enable Turn-On (300mA Load)
Enable Turn-Off (300mA Load)
Load Transient Response (0.1mA to 300mA)
Line Transient Response (3.85V to 4.85V)
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
7
Doc. No. MD-4010 Rev. A
CAT6218
PACKAGE DIMENSIONS
5-LEAD TSOT-23
(1)(2)
e
e
E
E1
e1
SYMBOL
MIN
NOM
MAX
A
—
—
1.00
A1
0.01
0.05
0.10
A2
0.80
0.87
0.90
b
0.30
—
0.45
c
0.12
0.15
0.20
D
2.90 BSC
E
2.80 BSC
E1
1.60 BSC
e
0.95 BSC
e1
1.90 BSC
L
0.30
0.40
L1
0.60 REF
L2
0.25 BSC
θ
0.50
0º
8º
D
A2
GAUGE
PLANE
c
A
L2
b
θ
L
A1
L1
For current Tape and Reel information, download the PDF file from:
http://www.catsemi.com/documents/tapeandreel.pdf.
Notes:
(1) All dimensions are in millimeters, angles in degrees.
(2) Refer JEDEC MO-193.
Doc. No. MD-4010 Rev. A
8
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT6218
EXAMPLE OF ORDERING INFORMATION
Prefix
Device #
CAT
6218
Company ID
Product Number
6218
Part Number
(1)(2)(3)(5)
Suffix
-180
TD
-G
VOUT Voltage (4)
180: 1.80V
240: 2.40V
270: 2.70V
285: 2.85V
300: 3.00V
320: 3.20V
330: 3.30V
Package
TD: TSOT-23
Lead Finish
G: NiPdAu
Tape & Reel
T: Tape & Reel
3: 3000 Units/Reel
VOUT Voltage
Package
Quantity per Reel
1.80V
TSOT-23
3000
CAT6218-240TD-GT3
2.40V
TSOT-23
3000
CAT6218-270TD-GT3
2.70V
TSOT-23
3000
2.85V
TSOT-23
3000
3.00V
TSOT-23
3000
3.20V
TSOT-23
3000
3.30V
TSOT-23
3000
CAT6218-180TD-GT3
CAT6218-285TD-GT3
(4)
(4)
CAT6218-300TD-GT3
CAT6218-320TD-GT3
(4)
CAT6218-330TD-GT3
T3
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The standard finish is NiPdAu.
(3) The device used in the above example is a CAT6218-180 TD-GT3 (VOUT = 1.8V, in an TSOT-23 package, NiPdAu, Tape and Reel, 3000 units).
(4) Standard voltages are 2.4V, 2.7V, 3.0V, and 3.3V. For other voltage options, please contact your nearest Catalyst Semiconductor Sales
office.
(5) Top marking for CAT6218 is RU.
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
9
Doc. No. MD-4010 Rev. A
REVISION HISTORY
Date
06/19/2007
Rev.
A
Reason
Preliminary Revision
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, and Quad-Mode™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal
injury or death may occur.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled
"Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical
semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
2975 Stender Way
Santa Clara, CA 95054
Phone: 408.542.1000
Fax:
408.542.1200
www.catsemi.com
Document No: MD-4010
Revision:
A
Issue date:
06/19/07
Similar pages