ANALOG DEVICES ADP3041 Service Manual

查询ADP3041供应商查询ADP3041供应商

TFT LCD Panel Power Module

ADP3041

FEATURES
600 kHz PWM Frequency
Fully Integrated 1.5 A Power Switch
3% Output Regulation Accuracy
Simple Compensation
Small Inductor and MLC Capacitors
300 ␮A Quiescent Supply Current
90% Efficiency
Undervoltage Lockout
5 Buffers
TSSOP 20-Lead Package
Pb-Free Part

APPLICATIONS
TFT LCD Bias Supplies

GENERAL DESCRIPTION

The ADP3041 is a fixed frequency, PWM step-up dc-to-dc
switching regulator with five buffers capable of 12 V boosted
output voltage in a TSSOP 20-lead package. It provides high
efficiency, low noise operation, and excellent dynamic response,
and is easy to use. The high switching frequency allows for small,
cost-saving, external inductive and capacitive components. The
ADP3041 operates in PWM current mode. The current limit
and the power switch are integrated completely on-chip.

Capable of operating from 2.5 V to 5.5 V input, the ADP3041
is ideal for thin-film transistor (TFT) liquid crystal display
(LCD) module applications, where local point-of-use power
regulation is required. Supporting output voltages down to 4.5 V,
the ADP3041 is ideal to generate today’s low voltage rails, pro­viding the optimal solution in its class for delivering power
efficiently, responsively, and simply with minimal printed circuit
board area.

The ADP3041 integrates five buffers. Each buffer can deliver
35 mA output current and has rail-to-rail input and output
capability.

FB

NC

SD

SS

AVCC

VCMI

G1I

G2I

G3I

G4I

FUNCTIONAL BLOCK DIAGRAM

REF

RAMP

GEN

OSC

SOFT START

g

m

ERROR

AMP

COMP

COMPARATOR

AGND

IN

BIAS

F/F

R

Q

S

ADP3041

DRIVER

CURRENT

SENSE

AMPLIFIER

SW

PGND

VCMO

G1O

G2O

G3O

G4O

REV. D

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2003 Analog Devices, Inc. All rights reserved.

1

ADP3041–SPECIFICATIONS

Parameter Symbol Conditions Min Typ Max Unit

SUPPLY

Input Voltage V
Operating Current

2

Quiescent Current I
Shutdown Current I

ERROR AMPLIFIER

Feedback Voltage Accuracy V
Line Regulation V
FB Bias Current 100 nA
Overall Regulation Line, Temperature –3 +3 %

OUTPUT SWITCH

On Resistance R
Output Load Current I

Leakage Current V
Efficiency I

OSCILLATOR

Oscillator Frequency f
Maximum Duty Cycle D
Minimum Duty Cycle D

SOFT START

Charge Current VSS = 3.3 V, CSS = 1 nF 2.5 µA

SHUTDOWN

Input Voltage Low 0.8 V
Input Voltage High 2.2 V

CURRENT LIMIT

Peak Switch Current I

COMPENSATION

Transconductance g
Gain A

UNDERVOLTAGE LOCKOUT

UVLO Threshold 2.2 2.4 2.5 V
UVLO Hysteresis 130 mV

OUTPUT

Voltage Range V
Load Regulation I

IN

I

QSW

Q

SD

FB

DS (ON)

LOAD

OSC

MAX

MIN

CL

m

V

OUT

(VIN = 3.3 V, TA = –40ⴗC to +85ⴗC, unless otherwise noted.)

2.5 3.3 5.5 V
f = 600 kHz, No Load, 1 5 mA
AVCC = Open
Not Switching, AVCC = Open 270 500 µA
AVCC = Open 10 µA

1.215 1.233 1.251 V

= 2.5 V to 5.5 V –0.15 +0.15 %/V

IN

At 1.5 A, VIN = 3.3 V 300 mΩ
Continuous Operation,

= 3.3 V, V

V

IN

SWITCH

= 200 mA, V

LOAD

I

= 100 mA, V

LOAD

= 12 V, SD = 0 V 5 µA

= 10 V 300 mA

OUT

= 10 V 90 %

OUT

= 10 V 90 %

OUT

0.4 0.6 0.9 MHz
COMP = Open, FB = 1 V 80 90 %
COMP = Open, FB = 1 V 40 %

1.5 1.8 A

100 µA/V
1000 V/V

VIN = 2.5 V to 5.5 V 4.5 12 V

= 10 mA to 150 mA,

LOAD

V

= 10 V 0.05 mV/mA

OUT

REV. D–2–

ADP3041

Parameter Symbol Conditions Min Typ Max Unit

BUFFER INPUT
CHARACTERISTICS

Offset Voltage V
Offset Voltage Drift ⌬V
Input Bias Current I

OS

/⌬T –40°C ≤ TA ≤ +85°C5µV/°C

OS

B

–40°C ≤ T

≤ +85°C 800 nA

A

Input Voltage Range –0.5 V
Input Impedance Z
Input Capacitance C

IN

IN

OUTPUT CHARACTERISTICS

Output Voltage High V

Output Voltage Low V

Continuous Output Current I
Peak Output Current I

OH

OL

OUT

PK

IL = 100 µAV
V

= 12 V, IL = 5 mA 11.85 11.94 V

S

–40°C ≤ T

= 4.5 V, IL = 5 mA 4.2 4.38 V

V

S

–40°C ≤ T

≤ +85°C 11.75 V

A

≤ +85°C 4.1 V

A

IL = 100 µA5mV

= 12 V, IL = 5 mA 42 150 mV

V

S

–40°C ≤ T
V

= 4.5 V, IL = 5 mA 95 300 mV

S

≤ +85°C 250 mV

A

VS = 12 V 250 mA

TRANSFER CHARACTERISTICS

Gain AVCL R

Gain Linearity NL R

= 2 kΩ 0.995 0.9985 1.005 V/V

L

–40°C ≤ T

= 2 kΩ,

L

≤ +85°C 0.995 0.9985 1.005 V/V

A

VO = 0.5 to (VS – 0.5 V) 0.01 %

POWER SUPPLY

Supply Voltage V

S

Power Supply Rejection Ratio PSRR V

Supply Current/Amplifier I

SY

= 4 V to 12 V,

S

–40°C ≤ T

≤ +85°C7090 dB

A

VO = VS/2, No Load 780 1000 µA

4.5 12 V

–40°C ≤ TA ≤ +85°C 1.2 mA

DYNAMIC PERFORMANCE

Slew Rate SR RL = 10 kΩ, CL = 200 pF 4.5 8 V/µs
Bandwidth BW –3 dB, R
Phase Margin ␾mR

L

= 10 kΩ, CL = 10 pF 8 MHz

L

= 10 kΩ, CL = 10 pF 65 Degrees

NOISE PERFORMANCE

Voltage Noise Density e

Current Noise Density i

NOTES

1

All limits at temperature extremes are guaranteed via correlation and characterization using standard Statistical Quality Control (SQC).

2

This is the average current while switching.

Specifications subject to change without notice.

n

e

n

n

f = 1 kHz 27 nV/√Hz
f = 10 kHz 25 nV/√Hz
f = 10 kHz 0.8 pA/√Hz

210mV

80 600 nA

+ 0.5 V

S

400 kΩ
1pF

– 0.005 V

S

400 mV

35 mA

REV. D

–3–

ADP3041

SS

COMP

SW

FB

IN

PGND

SD

VCMO

G1O

AGND

G2O

G3O

G4O

G1I

G2I

G3I

G4I

VCMI

AVCC

NC

TOP VIEW

(Not to Scale)

20

19

18

17

16

15

14

13

12

11

NC = NO CONNECT

1

2

3

4

5

6

7

8

9

10

ADP3041

ABSOLUTE MAXIMUM RATINGS*

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to + 6 V

Buffer Input Voltage . . . . . . . . . . . . . –0.5 V to AVCC + 0.5 V

SW Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 V

COMP Voltage . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +2.5 V

FB Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +1.3 V

SD Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V

PGND to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mV

Operating Ambient Temperature Range . . . . .–40°C to +85°C

Operating Junction Temperature Range . . . . –40°C to +125°C

Storage Temperature Range . . . . . . . . . . . . .–65°C to +150°C

2-Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143°C/W

␪

JA

4-Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112°C/W

␪

JA

Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods may affect device reliability.

ORDERING GUIDE

Temperature Voltage Package

Model Range Output Option

ADP3041ARU –40°C to +85°C 4.5 V to 12 V TSSOP-20
ADP3041ARUZ* –40°C to +85°C 4.5 V to 12 V TSSOP-20

*Z = Pb-free part.

D1

R1

C

OUT

L1

SW

V

IN

C

IN

R

SD

ADP3041

IN

SD

NC

AVCC

VCMI

G1I

G2I

G3I

G4I

PGND

AGND

FB

COMP

SS

VCMO

G1O

G2O

G3O

G4O

R2

C

C

R

C

C

SS

PIN CONFIGURATION

PIN FUNCTION DESCRIPTIONS

Pin No. Mnemonic Function

1SWSwitching Output

2INMain Power Supply Input
3 SD Shutdown Input

4NCNo Connection

5 AVCC Buffers Power Supply Input

6 VCMI VCOM Buffer Input

7 G1I Gamma 1 Buffer Input

8 G2I Gamma 2 Buffer Input

9 G3I Gamma 3 Buffer Input

10 G4I Gamma 4 Buffer Input

11 G4O Gamma 4 Buffer Output

12 G3O Gamma 3 Buffer Output

13 G2O Gamma 2 Buffer Output

14 G1O Gamma 1 Buffer Output

15 VCMO VCOM Buffer Output

16 SS Soft Start Capacitor Timer Set

17 COMP Compensation Input

18 FB Feedback Voltage Sense Input

19 AGND Analog Signal Ground

20 PGND Ground Return for Power Transistor

Figure 1. Typical Application

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
ADP3041 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.

REV. D–4–

Typical Performance Characteristics–

TEMPERATURE (ⴗC)

5

–5

–40

INPUT OFFSET CURRENT (nA)

25 85

–2

–3

–4

VS = 16V

VS = 4.5V

–1

4

3

2

1

0

ADP3041

100

TA = 25ⴗC

90

80

70

60

50

40

30

QUANTITY (Amplifiers)

20

10

0
–12 –9

4.5V < V

< 16V

S

–6 –3 0 3 6 9 12

INPUT OFFSET VOLTAGE (mV)

TPC 1. Input Offset Voltage Distribution

300

4.5V < VS < 16V

250

200

150

0

VCM = VS/2

–50

–100

–150

–200

–250

INPUT BIAS CURRENT (nA)

–300

–350

–40

VS = 16V

VS = 4.5V

25 85

TEMPERATURE (ⴗC)

TPC 4. Input Bias Current vs. Temperature

QUANTITY (Amplifiers)

–0.25

–0.50

–0.75

–1.00

INPUT OFFSET VOLTAGE (mV)

–1.25

–1.50

REV. D

100

50

0

0 10010

20 30 40 50 60 70 80 90

TCVOS (␮V/ⴗC)

TPC 2. Input Offset Voltage Drift Distribution

0

VCM = VS/2

VS = 16V

VS = 4.5V

–40

25 85

TEMPERATURE (ⴗC)

TPC 3. Input Offset Voltage vs. Temperature

–5–

TPC 5. Input Offset Current vs. Temperature

15.96

15.95

15.94

15.93

15.92

15.91

15.90

15.89

OUTPUT VOLTAGE SWING (V)

15.88

15.87

15.86

VS = 16V

VS = 4.5V

–40

25 85

TEMPERATURE (ⴗC)

I

LOAD

= 5mA

TPC 6. Output Voltage Swing vs. Temperature

4.46

4.45

4.44

4.43

4.42

4.41

4.40

4.39

4.38

4.37

4.36