CAT6202 D

CAT6202
500 mA / 13 V Adjustable
CMOS LDO Regulator
Description
The CAT6202 is a 13 V rated 500 mA CMOS low dropout regulator
that provides fast response time to load current and line voltage
changes in an automotive environment.
CAT6202 features a low RON P−channel pass element with internal
control circuitry which prevents reverse current flow should the
voltage at VOUT exceed VIN as in the case of the car’s battery voltage
accidentally being applied to VOUT.
Thermal protection and current limiting circuitry combine to protect
the pass device against faults and abuse. Current limiting is user
controlled through a single resistor to ground. A fault output (FLT)
provides an alert should an over−current event or thermal shutdown
occur.
CAT6202 comes on−line gracefully even though it may be driving
heavy capacitive loads thanks to built−in soft−start circuitry. Its output
is protected against accidental connection to voltages greater than VIN
and will not conduct current backwards into its supply.
CAT6202 is available in 8−pad 2 mm x 3 mm TDFN package.
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TDFN−8
VP2 SUFFIX
CASE 511AK
PIN CONNECTIONS
VIN
VADJ
EN
ILIM
BYP
GND
TDFN−8
(Top View)
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Guaranteed 500 mA Continuous Output Current
Low Dropout Voltage of 250 mV Typical at 500 mA
Input Voltage Range: 3.3 V to 13.5 V
User Adjustable Output Voltage
User Programmable Current Limit
Fault Output to Indicate Under−voltage, Current Limiting or Thermal
Shutdown has Occurred
Fault Blanking: 3 ms
VOUT Withstands Battery Fault Voltages of up to 14 V
Soft−Start Prevents Current Surges
Stable with Ceramic Output Capacitor
±1.0% Output Voltage Initial Accuracy
±2.0% Accuracy Over Temperature
Thermal Protection
8 Pad TDFN Package
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
© Semiconductor Components Industries, LLC, 2014
January, 2014 − Rev. 1
VOUT
1
FLT
1
MARKING DIAGRAMS
HXC
LAA
YM
G
HXC
L
AA
Y
M
G
= CAT6202VP2−GT3
= Assembly Location
= Last Two Digits of
= Assembly Lot Number
= Production Year (Last Digit)
= Production Month (1−9, O, N, D)
= Pb−Free Microdot
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
Publication Order Number:
CAT6202/D
CAT6202
VIN
VIN
VOUT
VOUT
ILIM
1 mF
2.2 mF
47 kW
CAT6202
VADJ
BYP
GND
10 nF
Figure 1. CAT6202 Typical Application
FLT
Bias Control
Current
Sensing
VIN
VOUT
Power PMOS
CIN
Over Current
REXT
1.25 V Ref
−
EN
BYP
CBYP
+ −
+
Enable &
Soft Start
Error
Amplifier
GND
Figure 2. CAT6202 Functional Block Diagram
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2
COUT
ILIM
R1
VADJ
R2
CAT6202
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
VIN
Supply voltage input
2
FLT
Fault indicator (active low)
3
EN
Enable input (active high)
4
BYP
A capacitor between BYP and GND controls the regulator’s turn−on speed and improves PSRR
5
GND
Ground reference
6
ILIM
Current limit control pin
7
VADJ
Output voltage adjustment
8
VOUT
LDO Output Voltage
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
VIN, VOUT
Value
Unit
0 to 16
V
−0.3 to +6.0
V
+150
_C
Internally Limited (Note 1)
mW
−65 to +150
_C
Lead Temperature (soldering, 5 sec.)
260
_C
ESD Rating (Human Body Model)
1000
V
ESD Rating (Machine Model)
350
V
All other pins
Junction Temperature, TJ
Power Dissipation, PD
Storage Temperature Range, TS
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. 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.
Table 3. RECOMMENDED OPERATING CONDITIONS (Note 2)
Range
Unit
3.3 to 13.5
V
0 to 6.0
V
−40 to +125
_C
Package Thermal Resistance (SOIC), θJA
235
_C/W
Package Thermal Resistance (TDFN), θJA
92
_C/W
Parameter
VIN, VOUT
All other pins
Junction Temperature Range, TJ
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
2. The device is not guaranteed to work outside its operating rating.
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CAT6202
Pin Function
VIN is the supply pin for both the LDO’s operation and the
load the LDO is driving. It is recommended that a 1 mF
ceramic bypass capacitor be placed between the VIN pin and
ground in close proximity to the device. When using longer
connections to the power supply, CIN value can be increased
without limit. The operating input voltage range is from
3.3 V to 13 V.
FLT is an active low open−drain output indicating one of 3
fault conditions:
1. Input under−voltage: VIN is below the intended
output voltage
2. Over−current. Brief over−current events are
masked by a 3 ms time delay. CAT6202 will limit
current anytime the load tries to draw more than
the maximum allowed however reporting of this
event will occur only if the event lasts longer than
the delay timer. Events terminating before the
timer reaches its full count are ignored and the
timer is reset.
3. Over−temperature shutdown has occurred.
EN is an active HIGH logic level input for switching the
regulator’s output between ON and OFF. A weak internal
pull down assures that if EN pin is left open, the circuit is
disabled.
BYP controls the soft−start feature for the regulator. When
large capacitive loads are present at the regulator’s output,
enabling the regulator will produce large current surges on
the VIN supply line. To reduce these surges the regulator can
be turned on gently by connecting a capacitor between the
BYP pin and ground. The larger the capacitance value the
more slowly VOUT approaches its programmed value. The
table below gives a list of common capacitor values and their
resulting turn−on times. If the soft−start feature is not
desired, this pin should be left floating.
Capacitance [nF]
tON [ms]
0
0.2
10
1
100
10
is defined as the current at which VOUT is still within 80%
of its nominal value and should not be confused with ISC, the
short circuit current, measured at VOUT = 0 V, which is
typically 100 mA greater than ILIM.
A resistor REXT placed between ILIM and GND selects the
trip current according to a formula:
I LIMIT + I LIMIT0 )
Current_Limit_Factor(CLF)
R EXT
(eq. 1)
ILIM0 is the built−in minimum current limit (typically
150 mA), and CLF is a numerical value (typical 30,000
Volts) which relates the allowable load current to a
resistance value. The value of this resistor is determined by
the following equation:
R EXT(W) +
CLF(V)
I LIM(A) * I LIM0(A)
(eq. 2)
It is recommended that ILIM be set with at least 50%, and
preferably 60%, higher than the maximum intended
continuous IOUT.
Example: Set ILIMIT = 800 mA
R EXT(W) +
30, 000 V
+ 47 KW
0.8 A * 0.15 A
(eq. 3)
VADJ is the output voltage control pin. A resistor divider
placed between VOUT and GND whose center point
connects to VADJ sets the LDO regulator’s output voltage.
Typical VADJ value is 1.25 V. The current through the
resistor divider can be anywhere between 10 mA and 1 mA.
The higher this current is, the lower the noise.
VOUT is the LDO regulator output. A small 2.2 mF ceramic
bypass capacitor is required between VOUT and ground.
For better transient response, its value can be increased to
4.7 mF. This capacitor should be located near the device.
ǒ
V OUT + V ADJ 1 )
Ǔ
R1
R2
(eq. 4)
VOUT is protected against short circuits and over−temp
operation by internal circuitry. In the event of an
over−current, the LDO behaves like a current source,
limiting current at the output. The maximum current
allowed is set by REXT, the resistor between ILIM and GND.
If the load attempts to draw more than the allowed current,
VOUT and IOUT decrease together and thus limit the total
power delivered.
VOUT is protected against the application of voltages
greater than VIN. For example, in automotive applications,
if CAT6202 is powering a remote load and damage occurs
to a wiring harness shorting a powered line, Battery + for
instance, to VOUT, CAT6202 will not be damaged by this
higher voltage being applied to VOUT.
GND is the ground reference for the LDO. The TDFN
package center metal pad is internally connected to GND. If
electrical contact is made with this pad, it should be to GND
and/or the ground plane of the PCB. Connection to the
ground plane enhances thermal conductivity drawing heat
out of the package and into the surrounding PCB.
ILIM stands for Current Limit and is the control input for
setting the point at which the current limit is invoked. ILIM
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CAT6202
Table 4. ELECTRICAL CHARACTERISTICS
(VIN = VOUT + 1 V, VEN = High, IOUT = 1 mA, CIN = 1 mF, COUT = 2.2 mF, REXT = 47 kW, ambient temperature of 25°C (over recommended
operating conditions unless specified otherwise). Bold numbers apply for the entire junction temperature range.)
Symbol
VIN
Parameter
Conditions
Input Voltage
Min
Typ
Max
Unit
V
3.3
13.5
VOUT
Output Voltage
VADJ
12.5
VADJ
ADJ Voltage
1.238
IADJ
ADJ Input Current
TCOUT
Output Voltage Temp. Coefficient
VR−LINE
Line Regulation
1.250
0.5
VDROP
IGND
IGND−SD
PSRR
V
2.0
mA
40
VOUT + 1.0 < VIN < 13 V
−0.2
±0.1
−0.4
VR−LOAD
1.262
ppm/°C
+0.2
%/V
+0.4
Load Regulation
IOUT = 1 mA to 500 mA
1
2.5
%
Dropout Voltage (Note 3)
IOUT = 500 mA
250
350
mV
Ground Current
IOUT = 0 mA
100
150
mA
IOUT = 500 mA
160
300
Shutdown Ground Current
VEN < 0.4 V
Power Supply Rejection Ratio
f = 1 kHz, CBYP = 10 nF
2
mA
dB
62
f = 20 kHz, CBYP = 10 nF
52
TON
Turn−On Time
CBYP = 10 nF
700
ISC
Output short circuit current
VOUT < 0.8 V
700
800
1000
mA
ILIM
Output current limit
VOUT = 0.8 VOUT (1 mA)
600
650
800
mA
CLF
Current Limit Factor
VOUT < 0.8 V
24
30
36
KV
tFD
Fault Delay
1.5
3
6
ms
500
mW
VIN−UVLO
ESR
Under voltage lockout threshold
ms
3.1
ROUT equivalent series resistance
5
V
ENABLE INPUT
VHI
Logic High Level
VIN = 3.3 to 13 V
VLO
Logic Low Level
VIN = 3.3 to 13 V
IEN
Enable Input Current
VEN = 0.4 V
VEN = VIN
V
2
0.4
V
0.15
1
mA
3
5
THERMAL PROTECTION
TSD
Thermal Shutdown
140
°C
THYS
Thermal Hysteresis
10
°C
3. 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 3.3 V. The given values are for VOUT = 7.5 V.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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CAT6202
TYPICAL CHARACTERISTICS (shown for 7.5 V output)
(VIN = 8.5 V, R1 = 5.1 kW, R2 = 1 kW, CIN = 1 mF, COUT = 2.2 mF, CBYP = 10 nF, REXT = 47 kW,
FLT not connected, TA = 25°C unless otherwise specified.)
8
7.50
IOUT = 1 mA
6
IOUT = 500 mA
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
7
5
4
3
2
7.45
7.40
7.35
1
0
0
2
4
6
8
10
12
7.30
14
11
12
Figure 3. Dropout Characteristics
Figure 4. Line Regulation
13
14
100
125
1.26
ADJUSTABLE VOLTAGE (V)
OUTPUT VOLTAGE (V)
10
INPUT VOLTAGE (V)
VIN = 8 V
TEMP = 25°C
7.45
7.40
7.35
0
100
200
300
400
1.25
1.24
1.23
1.22
−25
500
0
25
50
75
OUTPUT LOAD CURRENT (mA)
TEMPERATURE (°C)
Figure 5. Load Regulation
Figure 6. Adjustable Voltage vs. Temperature
175
GROUND CURRENT (mA)
175
GROUND CURRENT (mA)
9
INPUT VOLTAGE (V)
7.50
7.30
8
150
125
100
150
125
100
VIN = 8.5 V
75
0
100
200
300
400
75
−25
500
0
25
50
75
100
OUTPUT LOAD CURRENT (mA)
TEMPERATURE (°C)
Figure 7. Ground Current vs. Load Current
Figure 8. Ground Current vs. Temperature
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125
CAT6202
TYPICAL CHARACTERISTICS (shown for 7.5 V output)
(VIN = 8.5 V, R1 = 5.1 kW, R2 = 1 kW, CIN = 1 mF, COUT = 2.2 mF, CBYP = 10 nF, REXT = 47 kW,
FLT not connected, TA = 25°C unless otherwise specified.)
200
150
100
VOUT = 0
REXT = ∞
50
0
2
4
6
8
10
12
150
125
100
75
50
25
0
14
10
1.50
1.25
1.00
0.75
8
10
12
2
4
6
8
10
12
6
4
2
0
14
4
5
6
7
8
9
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 11. Enable Threshold vs. Input Voltage
Figure 12. Fault Bar Voltage vs. Input Voltage
2.50
7
2.25
6
5
4
3
VIN = 8 V
TEMP = 25°C
2
1
100
200
300
400
500
600
700
800
900
2.00
1.75
1.50
1.25
1.00
0.75
VIN = VEN = 8 V
0.50
0.25
0
6
7
8
9
10
11
12
13
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
Figure 13. Output Voltage vs. Load Current
Figure 14. Output Current (Sink) vs. Output
Voltage
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7
14
8
8
0
6
Figure 10. Ground Current vs. Input Voltage
1.75
0
4
Figure 9. Output Short−circuit Current vs.
Input Voltage
12
0
2
INPUT VOLTAGE (V)
2.00
0.50
0
INPUT VOLTAGE (V)
FAULTBAR VOLTAGE (V)
ENABLE THRESHOLD VOLTAGE (V)
GROUND CURRENT (mA)
200
0
OUTPUT VOLTAGE (V)
175
250
OUTPUT CURRENT (SINK) (mA)
SHORT−CIRCUIT CURRENT (mA)
300
14
CAT6202
TYPICAL CHARACTERISTICS (shown for 7.5 V output)
(VIN = 8.5 V, R1 = 5.1 kW, R2 = 1 kW, CIN = 1 mF, COUT = 2.2 mF, CBYP = 10 nF, REXT = 47 kW,
TA = 25°C unless otherwise specified. All transient characteristics are generated using the evaluation board CAT6202EVAL1.)
Figure 15. Enable Turn−On (No Load)
Figure 16. Enable Turn−On (15 W Load)
Figure 17. Enable Operation (No Load)
Figure 18. Enable Operation (15 W Load)
Figure 19. Load Transient Response
(1 mA to 500 mA)
Figure 20. Fault Operation
(VIN = 7 V and 15 W Load)
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CAT6202
PACKAGE DIMENSIONS
TDFN8, 2x3
CASE 511AK−01
ISSUE A
D
A
e
b
E2
E
PIN#1
IDENTIFICATION
A1
PIN#1 INDEX AREA
D2
TOP VIEW
SIDE VIEW
SYMBOL
MIN
NOM
MAX
A
0.70
0.75
0.80
A1
0.00
0.02
0.05
A2
0.45
0.55
0.65
A3
A2
A3
b
0.20
0.25
0.30
D
1.90
2.00
2.10
D2
1.30
1.40
1.50
E
2.90
3.00
3.10
E2
1.20
1.30
1.40
L
BOTTOM VIEW
0.20 REF
e
FRONT VIEW
0.50 TYP
0.20
0.30
L
0.40
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC MO-229.
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CAT6202
Table 5. ORDERING INFORMATION
Device Order Number
CAT6202VP2−GT3
Specific
Device Marking
Package Type
Lead
Finish
Shipping†
HXC
TDFN−8
NiPdAu
Tape & Reel, 3,000 Units / Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,
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limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications
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CAT6202/D
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