Datasheet AMS6101 Datasheet (ROHS)

http://www.BDTIC.com/AMS

Advanced AMS6101

Monolithic 2A SWITCH STEP-UP DC/DC CONVERTER Systems

RoHS compliant

FEATURES APPLICATIONS

• 2A, 0.2Ω, internal switch • LCD TVs and LCD monitors

• Operating voltage as low as 2.7V • Battery Chargers

• 600 kHz operation frequency • Portable (Notebook) Computers

• Over temperature protection • Handheld Devices

• 8-Lead SOIC-EDP package • Portable Applications

GENERAL DESCRIPTION

The AMS6101 is an adjustable step-up DC/DC converter with a 2A internal switch. With the ability to set the output voltage up to 23V, the AMS6101 is an ideal part for biasing TFT displays. The AMS6101 can be operated at switching frequencies of 600 kHz allowing for easy filtering and low noise. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible the use of small, low ESR ceramic capacitors at the output. The AMS6101 is available in a low profile 8-lead SOIC EDP (thermally enhanced) package.

ORDERING INFORMATION PIN CONNECTIONS

OUTPUT PACKAGE TYPE TEMP.

VOLTAGE 8 Lead SOIC RANGE

Adjustable AMS6101S -25°C to 125°C

TYPICAL APPLICATION

• Consumer Electronics

• GSM/CDMA Phones

• Digital Cameras

AGND

8L SOIC

SO Package (S)

1

VCC

2

PGD

3

SW

4

Top View

8

7

6

5

EN

PGND

FB

COMP

Advanced Monolithic Systems, Inc.

http://www.BDTIC.com/AMS

PIN DESCRIPTION

AMS6101

PIN NUMBERS

1 VCC Analog power input.

2 PWGD Power good output. Open collector output. A low on the pin indicates that the output is less

3 SW Power switch input. Internal switch connected between SW pin and GND pin.

4 AGND Analog ground.

5 COMP Compensation network connection. Connected to the output of the voltage error amplifier.

6 F/B Feedback input pin of the error comparator.

7 PGND Power Ground-Noisy internal ground-Return currents from the power switch (SW).

8 EN Shutdown control input, active high.

NAME DESCRIPTION

AMS6101

than the desired output voltage. There is an internal rising filter on the output of the PWGD comparator.

Advanced Monolithic Systems, Inc.

AMS6101

http://www.BDTIC.com/AMS

ABSOLUTE MAXIMUM RATINGS (note 1)

VCC 15V Maximum Junction Temperature 150°C SW Voltage 23V Power Dissipation (Note2) Internally Limited F/B Voltage 7V Lead Temperature 300°C Comp 7V Vapor Phase (60 sec) 215°C EN 7V Infrared (15 sec) 220°C PWGD 15V ESD Susceptibility 2kV

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at TA= 25 °C, VIN=2.7V, IL = 0A (unless otherwise noted)

PARAMETER

Quiescent Current FB = 0V (Not Switching)

Feedback Voltage Switch Current Limit

Load Regulation

Feedback Voltage Line Regulation FB Pin Bias Current

Input Voltage Range 2.5 15 V Error Amp Transconductance Error Amp Voltage Gain Maximum Duty Cycle

Switching Frequency Shutdown Pin Current

Switch Leakage Current V SW = 18V 0.01 Switch R

VIN = 2.7V, I

DSON

Enable Threshold

On Threshold Off Threshold

Thermal Resistance Junction to Ambient 195

Note:

1). Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to be functional.

2). The maximum allowable power dissipation is a function of the maximum junction temperature, T ambient thermal resistance, θ

and the ambient temperature, TA. The maximum allowable power dissipation at any ambient

JA,

temperature is calculated using: P cause excessive die temperature, and the regulator will go into thermal shutdown.

3). All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface).

4). Typical numbers are at 25°C and represent the most likely norm.

5). Current limit at 0% duty cycle.

TEST CONDITIONS

AMS6101

Min. Typ. Max.

(Note3) (Note4) (Note3)

Units

1.3

V EN = 0V

1.2285

VIN = 2.7 (Note 5) 3

VIN = 3.3V

6.7 mV/mA

2.0V ≤ VIN ≤ 12.0V

∆I = 5µA

40

135 V/V

78 480

V EN = VIN

0.01

V EN = 0V

5

1.26 4 A

0.013 0.1 %V

0.5

135

85 % 600

-0.5

2.0

10

1.2915

20

290

720

0.1

-1

3

Output High Output Low

(MAX) = (T

D

= 1A 0.2

SW

0.9

0.6

1.8

1.7

– TA) θJA. Exceeding the maximum allowable power dissipation will

J (MAX)

1.92

1.82

(MAX), the junction-to-

J

0.4

0.3

2.0

1.9

mA

µA

V

nA

µmho

kHz µA

µA Ω V

V V

V

Advanced Monolithic Systems, Inc.

http://www.BDTIC.com/AMS

TYPICAL PERFORMANCE CHARACTERISTICS

Full Load Switching Full Load Ripple (Wide Band)

AMS6101

Start Up from Enable into Full Load Start Up from Enable into Light Load

Switch Full Load Rise Time Switch Full Load Fall Time

Effic iency

90

Efficiency for 5V input and 12V Output

Advanced Monolithic Systems, Inc.

88 86

84 82 80

%

78 76

74 72 70

0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5

Load Current

http://www.BDTIC.com/AMS

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

8 LEAD SOIC PLASTIC PACKAGE (S)

0.189-0.197*

(4.801-5.004)

87 65

0.123 (3.12)

0.137 (3.48)

87 65

AMS6101

0.063(1.60)

0.228-0.244

(5.791-6.197)

0.053-0.069

(1.346-1.752)

0.014-0.019

(0.355-0.483)

12 34

0.138 (3.50)

0.050(1.27)0.024(0.61)

0.105(2.67)

(0.101-0.254)

0.050 (1.270)

TYP

0.150-0.157**

(3.810-3.988)

0.004-0.010

0.213(5.41)

0.090 (2.28)

0.102 (2.59)

12 34

0.010-0.020 (0.254-0.508)

0.008-0.010

(0.203-0.254)

0.016-0.050

(0.406-1.270)

*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

x 45°

0°-8 ° TYP

S (SO- 8 ) AMS DRW# 0422 93

RECOMMENDED LAYOUT PATTERN

Advanced Monolithic Systems, Inc.