CAT6242
1.3 Amp CMOS LDO Voltage
Regulator
Description
The CAT6242 is a low dropout CMOS voltage regulator providing
up to 1300 mA of output current with fast response to load current and
line voltage changes. CAT6242 has a fixed output voltage that is
factory programmable to a level between 1.1 V and 4.1 V with steps of
0.1 V. Other fixed values in the range are available on demand.
CAT6242 is packaged in a space saving 3 mm x 3 mm WDFN−6
package with a power pad for heat sinking to the PCB.
Features
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•
Guaranteed 1300 mA Continuous Output Current
•
Wide Range of Output Voltages Available On Request:
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WDFN−6
3 x 3 mm
CASE 511AP
1.1 V to 4.1 V in 100 mV Steps
Low Dropout Voltage of Maximum 350 mV at 1.3 A for V
OUT
=
3.3 V
±1.0%
Output Voltage Accuracy,
±2.0%
Over Temperature
No−load Ground Current of 70
mA
Typical
Full−load Ground Current of 160
mA
Typical
“Zero” Current Shutdown Mode
Under Voltage Lockout
Stable with Ceramic Output Capacitors
Current Limit and Thermal Protection
3 mm x 3 mm WDFN−6 Power Package
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
DSP Core and I/O Voltages
FPGAs, ASICs
PDAs, Mobile Phones, GPS
Camcorders and Cameras
Hard Disk Drives
PIN CONNECTIONS
EN
GND
BYP
(Top View)
1
VIN
SENSE
VOUT
MARKING DIAGRAM
62XX
LAAA
YWW
G
1
(WDFN−6)
62XX
L
AAA
Y
WW
G
= Specific Device Code
= Assembly Location Code
= Assembly Lot Number (Last Three Digits)
= Production Year (Last Digit)
= Production Week (Two Digits)
= Pb−Free Package
Typical Applications
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ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
©
Semiconductor Components Industries, LLC, 2012
November, 2012
−
Rev. 4
1
Publication Order Number:
CAT6242/D
CAT6242
VIN
C
IN
1
mF
VIN
VOUT
SENSE
CAT6242
ENABLE
BYP
C
BYP
(Optional)
GND
C
OUT
2.2
mF
VOUT
Figure 1. Application Schematic
VIN
VOUT
I
SENSE
Thermal
Shutdown
SENSE
+
−
NC
2.5 M
EN
Enable
Logic
+
V
REF
−
BYP
GND
Figure 2. Simplified Block Diagram
Table 1. PIN FUNCTION DESCRIPTION
Pin #
WDFN−6
1
2, Pad
Pin Name
EN
GND
Description
The Enable Input. An active HIGH input, turning ON the LDO. A pull−up 2.5 MW resistor maintains the
circuit in the ON state if the pin is left open.
Power Supply Ground; Device Substrate. The center pad is internally connected to Ground and as
such can cause short circuits to signal traces running beneath the IC. This pad is intended for heat
sinking the IC to the PCB and is typically connected to the PCB ground plane.
Bypass input. Placing a capacitor of 100 pF to 470 pF between BYP and ground reduces noise on
V
OUT.
This capacitor is optional and it increases the turn−on time.
Regulated Output Voltage. A protection block eliminates any current flow from output to input if V
OUT
> V
IN
.
SENSE is the sense input of the circuit and is connected externally to the VOUT line.
Positive Power Supply Input. Supplies power for V
OUT
as well as the regulator’s internal circuitry.
3
4
5
6
BYP
V
OUT
SENSE
V
IN
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2
CAT6242
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage Range (Note 1)
Output Voltage Range
Enable Input Range
Bypass Input Range
Power Dissipation
Maximum Junction Temperature
Storage Temperature Range
ESD Capability, Human Body Model (Note 2)
ESD Capability, Machine Model (Note 2)
Lead Temperature Soldering
Reflow (SMD Styles Only), Pb−Free Versions (Note 3)
Symbol
V
IN
V
OUT
EN
BYP
Value
−0.3
to 7.0
−0.3
to 7.0
−0.3
to 7.0 V or (V
IN
+ 0.3),
whichever is lower
−0.3
to 5.5 V or (V
IN
+ 0.3),
whichever is lower
Internally Limited
150
−65
to 150
2
200
260
Unit
V
V
V
V
mW
°C
°C
kV
V
°C
PD
T
J(max)
T
STG
ESD
HBM
ESD
MM
T
SLD
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.
1. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating range.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
Latchup Current Maximum Rating:
≤150
mA per JEDEC standard: JESD78
3. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D
Table 3. THERMAL CHARACTERISTICS
Rating
Thermal Characteristics, WDFN−6, 3 x 3 mm
Thermal Resistance, Junction−to−Air: 1 in
2
/1 oz. copper (Note 4)
Thermal Reference, Junction−to−Case (Note 4)
Symbol
R
qJA
R
yJL
Value
55
10
Unit
°C/W
4. Values based on copper area of 645 mm
2
(or 1 in
2
) of 1 oz copper thickness and FR4 PCB substrate.
Table 4. OPERATING RANGES
(Note 5)
Rating
Input Voltage CAT6242 (Note 6)
Output Current
Output Voltage
Ambient Temperature
Symbol
V
IN
I
OUT
V
OUT
T
A
Min
1.8
1
1.1
−40
Max
5.5
1300
4.1
85
Unit
V
mA
V
°C
5. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating range.
6. Minimum V
IN_MIN
= 1.8 V or (V
OUT
+ V
DO
), whichever is higher.
Table 5. ELECTRICAL CHARACTERISTICS
(V
IN
= (V
OUT
+ 1 V) or V
IN_MIN
, whichever is higher, C
IN
= 1
mF,
C
OUT
= 2.2
mF,
for
typical values T
A
= 25°C, for
Bold
values T
A
=
−40°C
to 85°C; unless otherwise noted.)
Symbol
INPUT / OUTPUT
V
IN
V
OUT
V
OUT−ACC
TC
OUT
I
OUT
Input Voltage
Output Voltage Range
Output Voltage Accuracy
Any level in range with
increments of 0.1 V
Initial accuracy, I
OUT
= 1 mA
Initial accuracy, I
OUT
= 1 mA
Output Voltage Temp. Coefficient
Output Current
0.001
1.8
1.1
−1
−2
25
1
1.3
5.5
4.1
1
2
ppm/°C
A
V
V
%
Parameter
Conditions
Min
Typ
Max
Unit
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CAT6242
Table 5. ELECTRICAL CHARACTERISTICS
(V
IN
= (V
OUT
+ 1 V) or V
IN_MIN
, whichever is higher, C
IN
= 1
mF,
C
OUT
= 2.2
mF,
for
typical values T
A
= 25°C, for
Bold
values T
A
=
−40°C
to 85°C; unless otherwise noted.)
Symbol
INPUT / OUTPUT
V
R−LINE
Line Regulation
V
IN
= V
OUT
+ 1.0 V to 5.5 V,
I
OUT
= 10 mA
V
IN
= V
OUT
+ 1.0 V to 5.5 V,
I
OUT
= 10 mA
V
R−LOAD
V
DO
Load Regulation
I
OUT
= 1 mA to 1300 mA
I
OUT
= 1 mA to 1300 mA
Dropout
Voltage
V
OUT
= 2.5 V
V
OUT
= 3.3 V
V
OUT
= 2.5 V
V
OUT
= 3.3 V
V
OUT
= 2.5 V
V
OUT
= 3.3 V
I
GND
I
GND−SD
ISC
Ground Current
I
OUT
= 300 mA
T
A
= 25°C
I
OUT
= 1 A
T
A
= 25°C
I
OUT
= 1.3 A
T
A
= 25°C
I
OUT
= 0
mA
I
OUT
= 1300 mA
Shutdown Ground Current
Output short circuit current limit
V
EN
< 0.4 V
CAT6242, V
OUT
= 0 V
f = 1 kHz, C
BYP
= 470 pF,
I
OUT
= 10 mA
f = 20 kHz, C
BYP
= 470 pF,
I
OUT
= 10 mA
e
N
Output Noise Voltage for 1.8 V output
BW = 10 Hz to 100 kHz
C
BYP
= 470 pF,
I
OUT
= 10 mA
1000
70
160
−0.2
−0.35
1.5
±0.05
0.2
0.35
2
3
110
85
350
275
450
350
100
250
2
mA
mA
mA
mV
%
%/V
Parameter
Conditions
Min
Typ
Max
Unit
PSRR AND NOISE
PSRR
Power Supply Rejection Ratio
CAT6242
54
42
45
mVrms
dB
UVLO, R
OUT
AND ESR
R
OUT−SH
ESR
ON resistance of Discharge Transistor
C
OUT
equivalent series resistance
Logic High Level
Logic Low Level
Enable Input Current
V
IN
= 1.8 to 5.5 V
V
IN
= 1.8 to 5.5 V
V
EN
= 0.4 V
V
EN
= V
IN
= 2.5 V
R
EN
TIMING
T
ON
Turn−On Time
C
BYP
= 0 pF
C
BYP
= 470 pF
THERMAL PROTECTION
T
SD
T
HYS
Thermal Shutdown
Thermal Hysteresis
145
10
°C
°C
230
1600
ms
Enable pull−up resistor
1
0.15
2.5
5
150
500
W
mW
ENABLE INPUT
V
HI
V
LO
I
EN
1.6
0.4
3
1
MW
V
V
mA
7. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at T
J
= T
A
= 25_C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
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CAT6242
TYPICAL CHARACTERISTICS (shown for 3.3 V Output Voltage)
3.33
3.32
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.31
3.30
3.29
3.28
3.27
3.26
3.25
3.24
3.23
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
200
400
600
800
1000
1200
1400
0
0
V
IN
= 3.6 V
200
400
600
800 1000 1200 1400 1600 1800
OUTPUT LOAD CURRENT (mA)
OUTPUT LOAD CURRENT (mA)
Figure 3. Output Voltage vs. Load Current
3.5
3.0
OUTPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
0
0
OUTPUT VOLTAGE (V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
600
800 1000 1200 1400 1600 1800
0
0
Figure 4. Output Voltage vs. Load Current
V
IN
= 4.3 V
V
IN
= 5.0 V
200
400
200
400
600
800 1000 1200 1400 1600 1800
OUTPUT LOAD CURRENT (mA)
OUTPUT LOAD CURRENT (mA)
Figure 5. Output Voltage vs. Load Current
3.5
3.0
OUTPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
0
0
200
400
600
V
IN
= 3.6 V
V
IN
= 4.3 V
Figure 6. Output Voltage vs. Load Current
V
IN
= 5.0 V
800 1000 1200 1400 1600 1800
OUTPUT LOAD CURRENT (mA)
Figure 7. Output Voltage vs. Load Current
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