ON Semiconductor CAT6241 User Manual

CAT6241

LDO Voltage Regulator -

Adjustable CMOS

1 A

Description

The CAT6241 is a low dropout CMOS voltage regulator providing up to 1000 mA of output current with fast response to load current and line voltage changes. CAT6241 offers a user adjustable output voltage from 0.5 V to 5.0 V and its low quiescent current make CAT6241 ideal for energy conscious designs. CAT6241 is available in space saving 2 mm x 2 mm UDFN−8 and 3 mm x 3 mm WDFN−6 packages, each with a power pad for heat sinking to the PCB.

Features

• Guaranteed 1000 mA Continuous Output Current

• V

: 0.5 V to 5.0 V, Minimum VIN: 1.6 V

OUT

• Dropout Voltage of 350 mV Typical at 1000 mA

• ±2.0% Output Voltage Accuracy at Room Temperature

• No−load Ground Current of 70 mA Typical

• Full−load Ground Current of 140 mA Typical

• “Zero” Current Shutdown Mode

• Under Voltage Lockout

• Stable with Ceramic Output Capacitors

• Current Limit and Thermal Protection

• 2 mm x 2 mm UDFN−8 and 3 mm x 3 mm WDFN−6 Packages

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Typical Applications

• DSP Core and I/O Voltages

• FPGAs, ASICs

• PDAs, Mobile Phones, GPS

• Camcorders and Cameras

• Hard Disk Drives

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WDFN−6 3 x 3 mm

CASE 511AP

PIN CONNECTIONS

1

EN

GND

BYP

1

VIN VIN

GND ADJ

(Top Views)

MARKING DIAGRAMS

62XX LAAA YWW

G

1

XXL

YM

G

1

XX = Specific Device Code 62XX = Specific Device Code L = Assembly Location Code AAA = Assembly Lot Number

Y = Production Year (Last Digit) M = Production Month (1−9, O, N, D) WW = Production Week (Two Digits) G = Pb−Free Package

= (Last Three Digits)

UDFN−8

2 x 2 mm

CASE 517AW

VIN

ADJ

VOUT

VOUT VOUT

BYPEN

(WDFN−6)

(UDFN−8)

September, 2019 − Rev. 6

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 17 of this data sheet.

1 Publication Order Number:

CAT6241/D

CAT6241

VIN

VIN VIN

EN

VIN

VOUT

ENABLE

C

IN

1 mF

CAT6241

ADJBYP

C

BYP

GND

(Optional)

Figure 1. Application Schematic

I

SENSE

Thermal

Shutdown

Enable

Logic

2.5 M

+

−

+

−

V

REF

C

OUT

2.2 mF

VOUT VOUT

ADJ

BYP

VOUT

GND

Figure 2. Simplified Block Diagram

Table 1. PIN FUNCTION DESCRIPTION

Pin #

WDFN−6

1 4 EN The Enable Input. An active HIGH input, turning ON the LDO. This input should be tied to

2, PAD 3, PAD GND Power Supply Ground; Device Substrate. The center pad is internally connected to Ground

3 5 BYP Bypass input. Placing a capacitor of 100 pF to 470 pF between BYP and ground reduces

4 7, 8 V

5 6 ADJ Output Voltage Adjust Input. This input ties to the common point of a resistor divider which

6 1, 2 V

Pin #

UDFN−8

Pin Name Description

if the LDO is not intended to be shut off during normal operation. A pull−down 2.5 MW

V

IN

resistor maintains the circuit in the OFF state if the pin is left open.

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.

OUT

noise on V

Regulated Output Voltage. A protection block eliminates any current flow from output to input if V

This capacitor is optional.

OUT.

> VIN. Connect both pins for specified dropout performance.

OUT

determines the regulator’s output voltage. See Applications section for details on selecting resistor values.

IN

Positive Power Supply Input. Supplies power for V circuitry. Connect both pins for specified dropout performance.

as well as the regulator’s internal

OUT

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CAT6241

Table 2. ABSOLUTE MAXIMUM RATINGS

Rating Symbol Value Unit

Input Voltage Range (Note 1) V

Output Voltage Range V

IN

OUT

Enable Input Range EN −0.3 to 5.5 V or (VIN + 0.3),

Adjust Input Range ADJ −0.3 to 5.5 V V

Bypass Input Range BYP −0.3 to 5.5 V or (VIN + 0.3),

Power Dissipation

Maximum Junction Temperature T

Storage Temperature Range T

ESD Capability, Human Body Model (Note 2) ESD

ESD Capability, Machine Model (Note 2) ESD

Lead Temperature Soldering

Reflow (SMD Styles Only), Pb−Free Versions (Note 3)

PD

J(max)

STG

HBM

T

SLD

MM

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

−0.3 to 6.0 V

V

whichever is lower

V

whichever is lower

Internally Limited mW

150 °C

−65 to 150 °C

2 kV

200 V

260 °C

Table 3. THERMAL CHARACTERISTICS

Rating Symbol Value Unit

Thermal Characteristics, WDFN−6, 3 x 3 mm

Thermal Resistance, Junction−to−Air: 1 in Thermal Reference, Junction−to−Case (Note 4)

2

/1 oz. copper (Note 4)

R

q

JA

R

y

JL

4. Values based on copper area of 645 mm2 (or 1 in2) of 1 oz copper thickness and FR4 PCB substrate.

Table 4. OPERATING RANGES (Note 5)

Rating

Input Voltage (Note 6) V

Output Current I

Output Voltage V

Ambient Temperature T

5. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating range.

6. Minimum V

IN_MIN

= 1.6 V or (V

Table 5. ELECTRICAL CHARACTERISTICS (V

typical values T

Symbol

= 25°C, for Bold values TA = −40°C to 85°C; unless otherwise noted.)

A

+ VDO), whichever is higher.

OUT

IN

= (V

+ 1 V) or V

OUT

Parameter Conditions Min Typ Max Unit

INPUT / OUTPUT

V

OUT

V

OUT−ACC

V

ADJ

TC

OUT

I

OUT

IN

Input Voltage 1.6 5.5 V

Output Voltage Range 0.5 5.0 V

Output Voltage Accuracy Initial accuracy, I

Voltage at ADJ input 0.485 0.5 0.515 V

Output Voltage Temp. Coefficient 50 ppm/°C

Output Current 0.0001 1 A

Symbol Min Max Unit

IN

OUT

A

, whichever is higher, CIN = 1 mF, C

IN_MIN

= 1 mA

OUT

1.6 5.5 V

0.1 1000 mA

0.5 5.0 V

−40 85 °C

−2 2

−3 3

55 10

= 2.2 mF, for

OUT

°C/W

%

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CAT6241

Table 5. ELECTRICAL CHARACTERISTICS (V

typical values T

= 25°C, for Bold values TA = −40°C to 85°C; unless otherwise noted.)

A

IN

= (V

+ 1 V) or V

OUT

, whichever is higher, CIN = 1 mF, C

IN_MIN

= 2.2 mF, for

OUT

Symbol UnitMaxTypMinConditionsParameter

INPUT / OUTPUT

V

R−LINE

V

R−LOAD

V

DO

I

ADJ

I

GND

I

GND−SD

ISC Output short circuit current limit V

Line Regulation

Load Regulation V

≥ 0.8 V

OUT

V

= 1.2 V

OUT

V

= 2.5 V 11 0

OUT

V

= 3.3 V 85

OUT

V

= 1.2 V

OUT

V

= 2.5 V 350

OUT

V

= 3.3 V 275

OUT

VIN = V I

OUT

VIN = V I

OUT

I

OUT

I

OUT

I

OUT

T

= 25°C

A

I

OUT

T

= 25°C

A

+ 1.0 V to 5.5 V,

OUT

= 10 mA

+ 1.0 V to 5.5 V,

OUT

= 10 mA

= 100 mA to 1000 mA

= 300 mA

= 1 A

−0.3 ±0.08 0.3

−0.45 0.45

1.5 2

3

460

700

%/V

%

mV

ADJ Input Current 100 nA

Ground Current

I

= 0 mA

OUT

I

= 0 mA

OUT

I

= 1000 mA 140 200

OUT

I

= 1000 mA 250

OUT

70

100

Shutdown Ground Current VEN < 0.4 V 5

= 0 V 900 mA

OUT

mA

PSRR AND NOISE

PSRR

e

N

UVLO, R

V

UVLO

R

OUT−SH

ESR C

Power Supply Rejection Ratio

Output Noise Voltage for 1.2 V output BW = 10 Hz to 100 kHz

AND ESR

OUT

f = 1 kHz, BYP = 470 pF, I

= 10 mA

OUT

f = 20 kHz, BYP = 470 pF, I

= 10 mA

OUT

BYP = 470 pF, I

OUT

= 10 mA

54

42

45

Under voltage lockout threshold 1.4 1.55 V

ON resistance of Discharge Transistor 150

equivalent series resistance 5 500

OUT

dB

mVrms

W

mW

ENABLE INPUT

V

HI

V

LO

I

EN

Logic High Level VIN = 1.6 to 5.5 V 1.6 V

Logic Low Level VIN = 1.6 to 5.5 V 0.4 V

Enable Input Current

VEN = 0.4 V 0.15 1

mA

VEN = VIN = 2.5 V 1 3

R

EN

Enable pull−down resistor 2.5

MW

TIMING

T

ON

Turn−On Time

C

= 0 pF 230

BYP

C

= 470 pF 1600

BYP

ms

THERMAL PROTECTION

T

SD

T

HYS

Thermal Shutdown 145 °C

Thermal Hysteresis 10 °C

7. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TJ = TA = 25_C. Low

duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.

8. Output current capability depends upon the value of both V

Figure 13). For V

> 0.8 V, current capability is 1 A for VIN ≥ 1.8 V.

OUT

and V

IN

OUT

. For V

≤ 0.8 V, output current capability is 90% of ISC (see

OUT

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(shown for V

ADJ

= V

= 0.5 V, VIN = 1.6 V, I

OUT

CAT6241

TYPICAL CHARACTERISTICS

= 1 mA, CIN = 1 mF, C

OUT

= 4.7 mF, C

OUT

= 0, and TA = 25°C unless otherwise specified.)

BYP

600

500

400

300

200

OUTPUT VOLTAGE (mV)

100

0

530

520

510

500

490

OUTPUT VOLTAGE (mV)

480

470

510

1 mA

400 mA

2.5 5.5

INPUT VOLTAGE (V)

3.5

5.0

4.54.03.02.01.51.00.50

505

500

495

OUTPUT VOLTAGE (mV)

490

1.51.00.5

INPUT VOLTAGE (V)

Figure 3. Dropout Characteristics Figure 4. Line Regulation

550

500

450

400

350

300

250

200

150

OUTPUT VOLTAGE (mV)

100

50

400

OUTPUT LOAD CURRENT (mA) OUTPUT LOAD CURRENT (mA)

5003002001000

0

200 400 500 600

3001000

Figure 5. Load Regulation Figure 6. Output Current Capability

5.5

5.04.54.03.53.02.52.00

100

90

80

70

60

50

40

GROUND CURRENT (mA)

30

20

OUTPUT LOAD CURRENT (mA) INPUT VOLTAGE (V)

5004003002001000

100

90

80

70

60

50

40

30

20

GROUND CURRENT (mA)

10

0

1.0 2.0 3.5 5.5

4.54.03.02.51.50.50

5.0

Figure 7. Ground Current vs. Load Current Figure 8. Ground Current vs. Input Voltage

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