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_______________General Description

The MAX8867/MAX8868 low-noise, low-dropout linear

regulators operate from a 2.5V to 6.5V input and deliver

up to 150mA. Typical output noise for these devices is

just 30µV

RMS

, and typical dropout is only 165mV at

150mA. The output voltage is preset to voltages in the

range of 2.5V to 5.0V, in 100mV increments. The

MAX8867 and MAX8868 are pin-compatible with the

MAX8863 and MAX8864, except for the BP pin.

Designed with an internal P-channel MOSFET pass tran-

sistor, the MAX8867/MAX8868 maintain a low 100µA

supply current, independent of the load current and

dropout voltage. Other features include a 10nA logic-

controlled shutdown mode, short-circuit and thermal-

shutdown protection, and reverse battery protection.

The MAX8868 also includes an auto-discharge function,

which actively discharges the output voltage to ground

when the device is placed in shutdown. Both devices

come in regular and thin 5-pin SOT23 packages.

________________________Applications

Cellular Telephones Modems

Cordless Telephones Hand-Held Instruments

PCS Telephones Palmtop Computers

PCMCIA Cards Electronic Planners

____________________________Features

♦ Low Output Noise: 30µV

RMS

♦ Low 55mV Dropout at 50mA Output

(165mV at 150mA output)

♦ Low 85µA No-Load Supply Current

♦ Low 100µA Operating Supply Current

(Even In Dropout)

♦ Thermal-Overload and Short-Circuit Protection

♦ Reverse Battery Protection

♦ Output Current Limit

♦ Preset Output Voltages (±1.4% Accuracy)

♦ 10nA Logic-Controlled Shutdown

MAX8867/MAX8868

Low-Noise, Low-Dropout,

150mA Linear Regulators in SOT23

________________________________________________________________ Maxim Integrated Products 1

GND

OUTIN

15BPSHDN

MAX8867

MAX8868

SOT23-5

TOP VIEW

__________________Pin Configuration

19-1302; Rev 3; 7/02

MAX8867

MAX8868

INPUT

2.5V TO 6.5V

IN OUT

SHDN

0.01µF

OUT

1µF

OFF

GND

OUTPUT

PRESET

2.5V TO 5.0V

150mA

__________Typical Operating Circuit

_________________Ordering Information

*Dice are tested at T

= +25°C only.

**xy is the output voltage code (see Expanded Ordering

Information table at end of data sheet).

PART**

TEMP

RANGE

PIN-PACKAGE

MAX8867EUKxy-T -40°C to +85°C SOT23-5 Regular

MAX8867EZKxy-T -40°C to +85°C SOT23-5 Thin

MAX8867C/Dxy 0°C to +70°C Dice*

MAX8868EUKxy-T -40°C to +85°C SOT23-5 Regular

MAX8868EZKxy-T -40°C to +85°C SOT23-5 Thin

MAX8868C/Dxy 0°C to +70°C Dice*

Summary of content (11 pages)

PAGE 1
9-1302; Rev 3; 7/02 Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 ____________________________Features ♦ Low Output Noise: 30µVRMS ________________________Applications _________________Ordering Information Cellular Telephones Modems Cordless Telephones Hand-Held Instruments PCS Telephones Palmtop Computers PCMCIA Cards Electronic Planners ♦ Low 55mV Dropout at 50mA Output (165mV at 150mA output) ♦ Low 85µA No-Load Supply Current ♦ Low 100µA Operating Supply Current (Even In Dropout)
PAGE 2
MAX8867/MAX8868 Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 ABSOLUTE MAXIMUM RATINGS IN to GND ....................................................................-7V to +7V Output Short-Circuit Duration ............................................Infinite SHDN to GND..............................................................-7V to +7V SHDN to IN ...............................................................-7V to +0.3V OUT, BP to GND ..........................................-0.
PAGE 3
Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 (VIN = VOUT(NOMINAL) + 0.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS THERMAL PROTECTION Thermal-Shutdown Temperature TSHDN 155 °C Thermal-Shutdown Hysteresis ∆TSHDN 15 °C Note 1: Limits are 100% production tested at TA = +25°C.
PAGE 4
____________________________Typical Operating Characteristics (continued) (VIN = VOUT(NOMINAL) + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25°C, unless otherwise noted.) MAX886 E_K50 OUTPUT VOLTAGE vs. TEMPERATURE 2.50 5.10 5.00 4.90 2.45 ILOAD = 50mA 180 GROUND PIN CURRENT (µA) ILOAD = 50mA OUTPUT VOLTAGE (V) 2.55 GROUND PIN CURRENT vs. TEMPERATURE 200 MAX8867/8-08 ILOAD = 50mA OUTPUT VOLTAGE (V) 5.20 MAX8867/8-07 2.60 MAX8867/8-09 MAX886 E_K25 OUTPUT VOLTAGE vs.
PAGE 5
Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 LOAD-TRANSIENT RESPONSE NEAR DROPOUT LOAD-TRANSIENT RESPONSE 3.01V 3.01V 3.00V 3.00V VOUT 2.99V LINE-TRANSIENT RESPONSE MAX8867/8-20 MAX8867/8-19 MAX8867/8-18 4V VIN 3V VOUT 2.99V 3.001V VOUT 50mA 50mA 2.999V ILOAD ILOAD 0mA 0mA 10µs/div MAX886 E_K30, VIN = VOUT + 0.1V, CIN = 10µF, ILOAD = 0mA TO 50mA 10µs/div MAX886 E_K30, VIN = VOUT + 0.
PAGE 6
MAX8867/MAX8868 Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 ______________________________________________________________Pin Description PIN NAME 1 SHDN Active-Low Shutdown Input. A logic low reduces the supply current to 10nA. On the MAX8868, a logic low also causes the output voltage to discharge to GND. Connect to IN for normal operation. 2 GND Ground. This pin also functions as a heatsink. Solder to a large pad or the circuit-board ground plane to maximize power dissipation.
PAGE 7
Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 Output Voltage The MAX8867/MAX8868 are supplied with factory-set output voltages from 2.5V to 5V, in 100mV increments. Except for the MAX886 E_K29 and the MAX886 E_K32 (which have an output voltage preset at 2.84V and 3.15V, respectively), the two-digit suffix allows the customer to choose the output voltage in 100mV increments. For example, the MAX8867EUK33 has a preset output voltage of 3.3V. (see Expanded Ordering Information).
PAGE 8
MAX8867/MAX8868 Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 Z5U and Y5V, it may be necessary to use 2.2µF or more to ensure stability at temperatures below -10°C. With X7R or X5R dielectrics, 1µF should be sufficient at all operating temperatures. Also, for high-ESR tantalum capacitors, 2.2µF or more may be needed to maintain ESR in the stable region. A graph of the Region of Stable C OUT ESR vs. Load Current is shown in the Typical Operating Characteristics. Use a 0.
PAGE 9
Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 SOT5L.EPS _______________________________________________________________________________________ 9 MAX8867/MAX8868 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
PAGE 10
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) THIN SOT23.
PAGE 11
Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 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.