Datasheet

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General Description

The MAX8510/MAX8511/MAX8512 ultra-low-noise, low-

dropout (LDO) linear regulators are designed to deliver

up to 120mA continuous output current. These regula-

tors achieve a low 120mV dropout for 120mA load cur-

rent. The MAX8510 uses an advanced architecture to

achieve ultra-low output voltage noise of 11µV

RMS

and

PSRR of 54dB at 100kHz.

The MAX8511 does not require a bypass capacitor,

hence achieving the smallest PC board area. The

MAX8512’s output voltage can be adjusted with an

external divider.

The MAX8510/MAX8511 are preset to a variety of volt-

ages in the 1.5V to 4.5V range. Designed with a P-channel

MOSFET series pass transistor, the MAX8510/MAX8511/

MAX8512 maintain very low ground current (40µA).

The regulators are designed and optimized to work with

low-value, low-cost ceramic capacitors. The MAX8510

requires only 1µF (typ) of output capacitance for stability

with any load. When disabled, current consumption drops

to below 1µA.

Package options include a 5-pin SC70 and a tiny 2mm x

2mm x 0.8mm TDFN package.

Applications

Cellular and Cordless Phones

PDA and Palmtop Computers

Base Stations

Bluetooth Portable Radios and Accessories

Wireless LANs

Digital Cameras

Personal Stereos

Portable and Battery-Powered Equipment

Features

o Space-Saving SC70 and TDFN (2mm x 2mm) Packages

o 11µV

RMS

Output Noise at 100Hz to 100kHz

Bandwidth (MAX8510)

o 78dB PSRR at 1kHz (MAX8510)

o 120mV Dropout at 120mA Load

o Stable with 1µF Ceramic Capacitor for Any Load

o Guaranteed 120mA Output

o Only Need Input and Output Capacitors (MAX8511)

o Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V,

2.85V, 3V, 3.3V, 4.5V (MAX8510/MAX8511) and

Adjustable (MAX8512)

o Low 40µA Ground Current

o Excellent Load/Line Transient

o Overcurrent and Thermal Protection

MAX8510/MAX8511/MAX8512

Ultra-Low-Noise, High PSRR,

Low-Dropout, 120mA Linear Regulators

________________________________________________________________

Maxim Integrated Products

BP (MAX8510)

N.C. (MAX8511)

FB (MAX8512)

GND

BP (MAX8510)

N.C. (MAX8511)

FB (MAX8512)

SHDN

OUT

MAX8510

MAX8511

MAX8512

MAX8510

MAX8511

MAX8512

SC70

*CONNECT EP TO GND.

N.C.

GND

N.C.

OUT

EP*

TDFN 2mm × 2mm

TOP VIEW

SHDN

Pin Configuration

Ordering Information

MAX8510

OUTPUT PRESET

1.5V TO 4.5V

INPUT

2V TO 6V

OFF

SHDN

= 10nF

OUT

= 1μF

OUT

GND

Typical Operating Circuits

19-2732; Rev 4; 8/11

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

xy is the output voltage code (see Output Voltage Selector

Guide). Other versions between 1.5V and 4.5V are available in

100mV increments. Contact factory for other versions.

Denotes a lead(Pb)-free/RoHS-compliant package.

= Tape and reel.

PART* TEMP RANGE PIN-PACKAGE

MAX8510EXKxy+T -40°C to +85°C 5 SC70-5

Typical Operating Circuits continued at end of data sheet.

Output Voltage Selector Guide appears at end of data sheet.

Ordering Information continued at end of data sheet.

Summary of content (10 pages)

PAGE 1
9-2732; Rev 4; 8/11 Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators Features o Space-Saving SC70 and TDFN (2mm x 2mm) Packages o 11µVRMS Output Noise at 100Hz to 100kHz Bandwidth (MAX8510) o 78dB PSRR at 1kHz (MAX8510) o 120mV Dropout at 120mA Load o Stable with 1µF Ceramic Capacitor for Any Load o Guaranteed 120mA Output o Only Need Input and Output Capacitors (MAX8511) o Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3V, 3.3V, 4.
PAGE 2
MAX8510/MAX8511/MAX8512 Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................-0.3V to +7V Output Short-Circuit Duration ............................................Infinite OUT, SHDN to GND ......................................-0.3V to (IN + 0.3V) FB, BP, N.C. to GND..................................-0.3V to (OUT + 0.3V) Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 3.
PAGE 3
Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators (VIN = VOUT + 0.5V, TA = -40°C to +85°C, unless otherwise noted. CIN = 1µF, COUT = 1µF, CBP = 10nF. Typical values are at +25°C; the MAX8512 is tested with 2.45V output, unless otherwise noted.
PAGE 4
Typical Operating Characteristics (continued) (VIN = VOUT + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 10nF, TA = +25°C, unless otherwise noted.) 90 60 TA = -40°C 30 350 200 IOUT = 120mA 300 GROUND PIN CURRENT (μA) TA = +25°C MAX8510 GROUND PIN CURRENT vs. INPUT VOLTAGE MAX8510 toc05 120 IOUT = 80mA DROPOUT VOLTAGE (mV) TA = +85°C DROPOUT VOLTAGE (mV) 250 MAX8510 toc04 150 MAX8510 DROPOUT VOLTAGE vs. OUTPUT VOLTAGE 150 100 50 MAX8510 toc06 MAX8510 DROPOUT VOLTAGE vs.
PAGE 5
Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators (VIN = VOUT + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 10nF, TA = +25°C, unless otherwise noted.) MAX8510 LOAD TRANSIENT RESPONSE MAX8510 OUTPUT NOISE vs. BP CAPACITANCE MAX8510 toc13 25 20 MAX8510 toc15 VIN = 3.5V ILOAD = 0 TO 50mA VIN = 3.
PAGE 6
MAX8510/MAX8511/MAX8512 Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators Pin Description PIN MAX8510 SC70 TDFN -EP 1 2 MAX8511 MAX8512 NAME SC70 SC70 TDFN -EP 5 1 5 1 5 IN 3 2 3 2 3 GND 3 4 3 4 3 4 SHDN 4 2 — — — — BP Noise Bypass for Low-Noise Operation. Connect a 10nF capacitor from BP to OUT. BP is shorted to OUT in shutdown mode. — — — — 4 2 FB Adjustable Output Feedback Point 5 7 5 7 5 7 OUT Regulated Output Voltage.
PAGE 7
Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators Noise Reduction For the MAX8510, an external 0.01µF bypass capacitor between BP and OUT with innovative noise bypass scheme reduces output noises dramatically, exhibiting 11µVRMS of output voltage noise with CBP = 0.01µF and COUT = 1µF. Startup time is minimized by a poweron circuit that precharges the bypass capacitor.
PAGE 8
MAX8510/MAX8511/MAX8512 Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators Dropout Voltage A regulator’s minimum dropout voltage determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the MAX8510/MAX8511/MAX8512 use a P-channel MOSFET pass transistor, their dropout voltage is a function of drain-to-source on-resistance (RDS(ON)) multiplied by the load current (see the Typical Operating Characteristics).
PAGE 9
Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators Output Voltage Selector Guide PART* TEMP RANGE PIN-PACKAGE PART VOUT (V) TOP MARK MAX8510EXKxy+T -40°C to +85°C 5 SC70 MAX8510EXK16+T 1.6 AEX -40°C to +85°C 8 TDFN-EP** 2mm x 2mm MAX8510EXK18+T 1.8 ATH MAX8510ETA25+T 2.5 AAO -40°C to +85°C 5 SC70 MAX8510EXK27+T 2.
PAGE 10
MAX8510/MAX8511/MAX8512 Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators Revision History REVISION NUMBER REVISION DATE 4 8/11 DESCRIPTION Corrected errors and added lead-free packages PAGES CHANGED 1, 2, 3, 6, 9 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.