CAT6219
500 mA CMOS LDO
Regulator
Description
The CAT6219 is a 500 mA CMOS low dropout regulator that
provides fast response time during load current and line voltage
changes.
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 150
ms.
With zero shutdown current and low ground current of 55
mA
typical, the CAT6219 is ideal for battery-operated devices with supply
voltages from 2.3 V to 5.5 V. An internal under voltage lockout circuit
disables the output at supply voltages under 2.15 V typical.
The CAT6219 offers 1% initial accuracy and low dropout voltage,
300 mV typical at 500 mA. Stable operation is provided with a small
value ceramic capacitor, reducing required board space and
component cost.
Other features include current limit and thermal protection.
The LDO is available in fixed and adjustable output in the low
profile (1 mm max height) 5−lead TSOT23, 6−pad 1.5 mm x 1.5 mm
WDFN and in the 6−pad 2 mm x 2 mm TDFN packages.
Features
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1
TSOT−23
TD SUFFIX
CASE 419AE
1
WDFN−6
MV2 SUFFIX
CASE 511BJ
1
TDFN−6
VP5 SUFFIX
CASE 511AH
PIN CONNECTIONS
VIN
GND
EN
TSOT−23
(Top Views)
1
VOUT
1
OUT
IN
NC/ADJ
NC
EN
GND
BYP/ADJ
WDFN−6
EN
GND
VIN
TDFN−6
1
TAB
BYP/ADJ
NC
VOUT
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Guaranteed 500 mA Peak Output Current
Low Dropout Voltage of 300 mV Typical at 500 mA
Stable with Ceramic Output Capacitor
External 10 nF Bypass Capacitor for Low Noise
Quick−start Feature
Under Voltage Lockout
No−load Ground Current of 55
mA
Typical
Full−load Ground Current of 85
mA
Typical
±1.0%
Initial Accuracy (V
OUT
≥
2.0 V)
±2.0%
Accuracy Over Temperature (V
OUT
≥
2.0 V)
“Zero” Current Shutdown Mode
Fold−back Current Limit
Thermal Protection
5−lead TSOT−23, 6−pad WDFN and TDFN Packages
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
MARKING DIAGRAMS
USYM
RVYM
UMYM
US = CAT6219−125, CAT6219−250,
=
CAT6219−300 Device Code
RV = CAT6219−180, CAT6219−280,
=
CAT6219−285, CAT6219−330 Device Code
UM = CAT6219−ADJ Device Code
Y = Production Year (last digit)
M = Production Month: 1
−
9, A, B, C
ABYM
(TDFN)
AB = CAT6219180, CAT6219VP5 Device Code
Y = Production Year (last digit)
M = Production Month: 1
−
9, A, B, C
TM
T
S
U
V
M
SM
UM
VM
(WDFN)
Applications
•
Cellular Phones
•
Battery−powered Devices
•
Consumer Electronics
= CAT6219−285MV2 Device Code
= CAT6219−280MV2 Device Code
= CAT6219−330MV2 Device Code
= CAT6219−ADJMV2 Device Code
= Date Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
©
Semiconductor Components Industries, LLC, 2012
September, 2012
−
Rev. 14
1
Publication Order Number:
CAT6219/D
CAT6219
V
IN
2.3 V
to 5.5 V
C
IN
1
mF
VIN
VOUT
V
OUT
V
IN
2.3 V
to 5.5 V
OFF ON
V
OUT
+
1.24 V
R
1
)
1
R
2
VIN
VOUT
V
OUT
R
1
CAT6219
EN
BYP
GND
C
OUT
2.2
mF
C
IN
1
mF
C
OUT
2.2
mF
CAT6219
EN
ADJ
OFF
ON
C
BYP
(Optional)
10 nF
GND
R
2
Figure 1. Typical Application Circuit
Table 1. PIN DESCRIPTIONS
Name
VIN
GND
EN
BYP
ADJ
VOUT
TAB
Function
Supply voltage input.
Ground reference.
Enable input (active high); a 2.5 MW pull−down
resistor is provided.
Optional bypass capacitor connection for noise
reduction and PSRR enhancing.
Adjustable input. Feedback pin connected to
resistor divider.
LDO Output Voltage.
To be connected to the ground plane on PCB
Figure 2. Adjustable Output LDO
EN
is the enable control logic (active high) for the regulator
output. It has a 2.5 MW pull−down resistor, which assures
that if EN pin is left open, the circuit is disabled.
VOUT
is the LDO regulator output. A small 2.2
mF
ceramic
bypass capacitor is required between the VOUT pin and
ground. For better transient response, its value can be
increased to 4.7
mF.
The capacitor should be located near the device. For the
SOT23-5 package, a continuous 500 mA output current may
turn-on the thermal protection. A 250
W
internal shutdown
switch discharges the output capacitor in the no-load
condition.
GND
is the ground reference for the LDO. The pin must be
connected to the ground plane on the PCB.
BYP
is the reference bypass pin. An optional 0.01
mF
capacitor can be connected between BYP pin and GND to
reduce the output noise and enhance the PSRR at high
frequency.
ADJ
is the adjustable input pin for the adjustable LDO. The
pin is connected to the resistor voltage divider.
Rating
0 to 6.5
−0.3
to V
IN
+ 0.3
+150
Internally Limited (Note 1)
−65
to +150
260
3
Unit
V
V
_C
mW
_C
_C
kV
Pin Function
VIN
is the supply pin for the LDO. A small 1
mF
ceramic
bypass capacitor is required between the V
IN
pin and ground
near the device. When using longer connections to the power
supply, C
IN
value can be increased without limit. The
operating input voltage range is from 2.3 V to 5.5 V.
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
V
IN
V
EN
, V
OUT
Junction Temperature, T
J
Power Dissipation, P
D
Storage Temperature Range, T
S
Lead Temperature (soldering, 5 sec.)
ESD Rating (Human Body Model)
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 3. RECOMMENDED OPERATING CONDITIONS
(Note 2)
Parameter
V
IN
V
EN
Junction Temperature Range, T
J
Package Thermal Resistance,
θ
JA
SOT23−5
Package Thermal Resistance,
θ
JA
TDFN−6
Range
2.3 to 5.5
0 to V
IN
−40
to +125
235
206
Unit
V
V
_C
_C/W
NOTE: Typical application circuit with external components is shown above.
1. The maximum allowable power dissipation at any T
A
(ambient temperature) is P
Dmax
= (T
Jmax
−
T
A
)/q
JA
. Exceeding the maximum allowable
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
2. The device is not guaranteed to work outside its operating rating.
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CAT6219
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Note 3)
(V
IN
= V
OUT
+ 1.0 V, V
EN
= High, I
OUT
= 100
mA,
C
IN
= 1
mF,
C
OUT
= 2.2
mF,
ambient temperature of 25°C (over recommended operating
conditions unless specified otherwise).
Bold numbers
apply for the entire junction temperature range.)
Symbol
V
OUT−ACC
TC
OUT
V
R−LINE
V
R−LOAD
V
DROP
I
GND
Parameter
Output Voltage Accuracy
Conditions
Initial accuracy for V
OUT
≥
2.0 V
(Note 6)
Min
−1.0
−2.0
40
V
IN
= V
OUT
+ 1.0 V to 5.5 V
I
OUT
= 100
mA
to 500 mA
I
OUT
= 500 mA
I
OUT
= 0
mA
I
OUT
= 500 mA
I
GND−SD
PSRR
Shutdown Ground Current
V
EN
< 0.4 V
f = 1 kHz, C
BYP
= 10 nF
f = 20 kHz, C
BYP
= 10 nF
I
SC
T
ON
e
N
R
OUT−SH
R
EN
V
UVLO
ESR
V
ADJ
V
HI
Output short circuit current limit
Turn−On Time
Output Noise Voltage (Note 5)
Shutdown Switch Resistance
Enable pull−down resistor
Under voltage lockout threshold
C
OUT
equivalent series resistance
Adjustable input voltage
I
OUT
= 100
mA
V
IN
= 2.3 to 5.5 V
V
IN
= 2.3 to 5.5 V, 0°C to +125°C
junction temperature
V
LO
I
EN
Logic Low Level
Enable Input Current
V
IN
= 2.3 to 5.5 V
V
EN
= 0.4 V
V
EN
= V
IN
THERMAL PROTECTION
T
SD
T
HYS
Thermal Shutdown
Thermal Hysteresis
160
10
°C
°C
0.15
1.5
5
1.2
1.24
V
OUT
= 0 V
C
BYP
= 10 nF
BW = 10 Hz to 100 kHz
64
54
200
150
45
250
2.5
2.15
500
1.27
mA
ms
mVrms
W
MW
V
mW
V
−0.2
−0.4
Load Regulation
1
±0.1
+0.2
+0.4
1.5
2
Dropout Voltage (Note 4)
300
400
500
Ground Current
55
75
90
85
1
2
Power Supply Rejection Ratio
dB
mA
mA
mV
%
Typ
Max
+1.0
+2.0
ppm/°C
%/V
Unit
%
Output Voltage Temp. Coefficient
Line Regulation
ENABLE INPUT
Logic High Level
1.8
1.6
0.4
1
4
V
mA
V
3. Specification for 2.80 V output version unless specified otherwise.
4. Dropout voltage is defined as the input−to−output differential at which the output voltage drops 2% below its nominal value. During test, the
input voltage stays always above the minimum 2.3 V.
5. Specification for 1.8 V output version.
6. For V
OUT
< 2.0 V, the initial accuracy is
±2%
and across temperature
±3%.
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CAT6219
TYPICAL CHARACTERISTICS
(shown for 2.80 V output option)
(V
IN
= 3.85 V, I
OUT
= 100
mA,
C
IN
1
mF,
= C
OUT
= 2.2
mF,
C
BYP
= 10 nF, T
A
= 25°C unless otherwise specified.)
3.0
0.1 mA
2.5
OUTPUT VOLTAGE (V)
2.0
1.5
1.0
0.5
0
OUTPUT VOLTAGE (V)
4.5 5.0
500 mA
2.86
2.85
2.84
2.83
2.82
2.87
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
INPUT VOLTAGE (V)
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 3. Dropout Characteristics
2.95
2.87
2.86
2.85
2.84
2.83
2.82
−40 −20
Figure 4. Line Regulation
OUTPUT VOLTAGE (V)
2.90
2.85
2.80
2.75
0
50
100 150 200 250 300 350 400 450 500
OUTPUT LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
0
20
40
60
80
100
120 140
TEMPERATURE (°C)
Figure 5. Load Regulation
70
GROUND CURRENT (mA)
GROUND CURRENT (mA)
60
50
40
30
20
10
0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
65
61
57
53
49
Figure 6. Output Voltage vs. Temperature
45
−40 −20
0
20
40
60
80
100
120 140
TEMPERATURE (°C)
Figure 7. Ground Current vs. Input Voltage
Figure 8. Ground Current vs. Temperature
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CAT6219
TYPICAL CHARACTERISTICS
(shown for 2.80 V output option)
(V
IN
= 3.85 V, I
OUT
= 100
mA,
C
IN
1
mF,
= C
OUT
= 2.2
mF,
C
BYP
= 10 nF, T
A
= 25°C unless otherwise specified.)
100
GROUND CURRENT (mA)
90
80
70
60
50
0
50
100 150 200 250 300 350 400 450 500
OUTPUT LOAD CURRENT (mA)
Figure 9. Ground Current vs. Load Current
500
500 mA DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
0
20
40
60
80
100
120
140
450
400
350
300
250
200
−40 −20
400
350
300
250
200
150
100
50
0
0
50
100 150 200 250 300 350 400 450 500
OUTPUT LOAD CURRENT (mA)
TEMPERATURE (°C)
Figure 10. Dropout vs. Temperature
(500 mA Load)
1.6
ENABLE THRESHOLD (V)
80
70
1.2
PSRR (dB)
60
50
40
30
20
10
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
Figure 11. Dropout vs. Load Current
C
BYP
= 10 nF
C
BYP
= 0
0.8
0.4
1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
INPUT VOLTAGE (V)
FREQUENCY (Hz)
Figure 12. Enable Threshold vs. Input Voltage
Figure 13. PSRR vs. Frequency (10 mA Load)
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