Maxim MAX8867EUK29-T, MAX8867EUK30-T, MAX8867C-D50, MAX8867C-D29, MAX8867C-D30 Datasheet

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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
transistor, 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 a miniature 5-pin SOT23 package.

________________________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

2

34

__________________Pin Configuration

19-1302; Rev 1; 3/98

PART**

MAX8867C/Dxy

MAX8867EUKxy-T
MAX8868C/Dxy

0°C to +70°C

-40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

Dice*
5 SOT23-5
Dice*

______________Ordering Information

___Expanded Ordering Information

*

Dice are tested at TA= +25°C.

**

xy is the output voltage code (see Expanded Ordering
Information table).

***

Other xy between 2.5V and 5.0V are available in 100mV incre-

ments. Contact factory for other versions. Minimum order
quantity is 25,000 units.

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

PRESET

OUTPUT

VOLTAGE

(V)

MAX886_EUK25 2.50

OUTPUT

VOLTAGE (xy)

CODE

ACAY

SOT TOP MARK

ACBF

MAX8867 MAX8868

MAX886_EUK28 2.80 ACAZ ACBG
MAX886_EUK29 2.84 ACBA ACBH
MAX886_EUK30 3.00 ACBB ACBI
MAX886_EUK32 3.15 ACBC ACBJ
MAX886_EUK33 3.30 ACBD ACBK
MAX886_EUK36 3.60 ACCZ ACDA

Other xy*** x.y0 — —

MAX886_EUK50 5.00 ACBE ACBL

MAX8867
MAX8868

INPUT

2.5V TO 6.5V
IN OUT

SHDN

C

BP

0.01µF

C

OUT

1µF

C

IN

1µF

OFF

ON

BP

GND

OUTPUT
PRESET

2.5V TO 5.0V
150mA

__________Typical Operating Circuit

MAX8867/MAX8868

Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= V

OUT(NOMINAL)

+ 0.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

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..........................................-0.3V to (V

IN

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

SOT23-5 (derate 7.1mW/°C above +70°C)...................571mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

θ

JB

..................................................................................140°C/W

Storage Temperature Range.............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

C

OUT

= 10µF

C

OUT

= 100µF

VIN= 2.5V to 5.5V

I

OUT

= 0mA, TA= +25°C

2.0

f = 10Hz to 100kHz,
C

BP

= 0.01µF

TA= +25°C 0.01 1
TA= +85°C

I

OUT

= 0mA to 120mA, C

OUT

= 1µF

No load
I

OUT

= 150mA

V

OUT

= 0V

I

OUT

= 150mA

VIN= 2.5V to 5.5V

CONDITIONS

TA= +25°C

µA

V

0.01 100

V

IH

0.4

SHDN Input Threshold

I

Q, SHDN

0.2

Shutdown Supply Current

TA= +25°C

TA= +85°C

V

SHDN

= V

IN

nAI

SHDN

0.5

SHDN Input Bias Current

V

IL

300MAX8868 only

Shutdown Discharge
Resistance

Ω

mA150Maximum Output Current

-1.4 1.4

V2.5 6.5V

IN

Input Voltage (Note 2)

µV

RMS

20

e

n

30

Output Voltage Noise

%/mA0.01 0.04∆V

LDR

Load Regulation

mA160 390I

LIM

Current Limit

I

OUT

= 1mA

85 180

I

OUT

= 50mA

Ground Pin Current µA

100

I

Q

1.1

165

UNITSMIN TYP MAXSYMBOLPARAMETER

Dropout Voltage (Note 2) mV

55 120

30 150

TA= -40°C to +85°C

CBP= 0.1µF,
C

OUT

= 1µF, no load

µs

300

Shutdown Exit Delay
(Note 3)

VIN= (V

OUT

+ 0.1V) to 6.5V, I

OUT

= 1mA %/V-0.15 0 0.15∆V

LNR

Line Regulation

I

OUT

= 0mA to 120mA

%

-3 2

Output Voltage Accuracy

SHUTDOWN

MAX8867/MAX8868

Low-Noise, Low-Dropout,

150mA Linear Regulators in SOT23

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VIN= V

OUT(NOMINAL)

+ 0.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Note 1: Limits are 100% production tested at T

A

= +25°C. Limits over the operating temperature range are guaranteed through

correlation using Statistical Quality Control (SQC) Methods.

Note 2: The dropout voltage is defined as V

IN

- V

OUT

, when V

OUT

is 100mV below the value of V

OUT

for VIN= V

OUT

+ 0.5V.

Note 3: Time needed for V

OUT

to reach 95% of final value.

CONDITIONS

°C155T

SHDN

Thermal Shutdown
Temperature

UNITSMIN TYP MAXSYMBOLPARAMETER

°C15∆T

SHDN

Thermal Shutdown
Hysteresis

__________________________________________Typical Operating Characteristics

(VIN= V

OUT(NOMINAL)

+ 0.5V, CIN= 1µF, C

OUT

= 1µF, CBP= 0.01µF, TA= +25°C, unless otherwise noted.)

2.40

2.45

2.50

2.55

2.60

0 50 100 150

MAX886_EUK25

OUTPUT VOLTAGE vs. LOAD CURRENT

MAX8867/8-01

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

4.8

4.9

5.0

5.1

5.2

0 50 100 150

MAX886_EUK50

OUTPUT VOLTAGE vs. LOAD CURRENT

MAX8867/8-02

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

60

70
65

85
80
75

100

95
90

110
105

0 50 100 150

GROUND PIN CURRENT

vs. LOAD CURRENT

MAX8867/8-03

LOAD CURRENT (mA)

GROUND PIN CURRENT (µA)

MAX886_EUK50

MAX886_EUK25

THERMAL PROTECTION

0

20

60

40

80

100

120

0 21 3 54 6

MAX886_EUK25

GROUND PIN CURRENT vs. INPUT VOLTAGE

MAX8867/8-04

INPUT VOLTAGE (V)

GROUND PIN CURRENT (µA)

I

LOAD

= 50mA

NO LOAD

0

20

60

40

80

100

120

0 21 3 54 6

MAX886_EUK50

GROUND PIN CURRENT vs. INPUT VOLTAGE

MAX8867/8-05

INPUT VOLTAGE (V)

GROUND PIN CURRENT (µA)

I

LOAD

= 50mA

NO LOAD

0

1

3

2

4

5

6

0 21 3 54 6

OUTPUT VOLTAGE vs. INPUT VOLTAGE

MAX8867/8-06

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

MAX886_EUK50

MAX886_EUK25

10

0.01

0.1 1 10 100 1000

OUTPUT NOISE SPECTRAL DENSITY

vs. FREQUENCY

MAX8867/8-13

FREQUENCY (kHz)

OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)

0.1

1

C

OUT

= 1µF

C

BP

= 0.01µF

I

LOAD

= 10mA

C

OUT

= 10µF

80

0

0.001 0.01 0.1

OUTPUT NOISE vs. BP CAPACITANCE

20
10

MAX8867/8-14

BP CAPACITANCE (µF)

OUTPUT NOISE (µV

RMS

)

30

50

60

40

70

MAX886_EUK50

C

OUT

= 10µF

I

LOAD

= 10mA

f = 10Hz TO 100kHz

MAX886_EUK30

MAX886_EUK25

60

0

1 10 100

OUTPUT NOISE vs. LOAD CURRENT

20

10

40

30

50

MAX8867/8-15

LOAD CURRENT (mA)

OUTPUT NOISE (µV

RMS

)

MAX886_EUK50

C

OUT

= 10µF

C

BP

= 0.01µF

f = 10Hz TO 100kHz

MAX886_EUK30

MAX886_EUK25

MAX8867/MAX8868

Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23

4 _______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

(VIN= V

OUT(NOMINAL)

+ 0.5V, CIN= 1µF, C

OUT

= 1µF, CBP= 0.01µF, TA= +25°C, unless otherwise noted.)

2.40

2.50

2.45

2.55

2.60

-40 0-20 20 8040 60 100

MAX886_EUK25

OUTPUT VOLTAGE vs. TEMPERATURE

MAX8867/8-07

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

I

LOAD

= 50mA

0

100

50

200

150

250

0 4020 60 80 140100 120 160

MAX886_EUK25

DROPOUT VOLTAGE vs. LOAD CURRENT

MAX8867/8-10

LOAD CURRENT (mA)

DROPOUT VOLTAGE (mV)

TA = +85°C

TA = -40°C

TA = +25°C

4.80

5.00

4.90

5.10

5.20

-40 0-20 20 8040 60 100

MAX886_EUK50

OUTPUT VOLTAGE vs. TEMPERATURE

MAX8867/8-08

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

I

LOAD

= 50mA

0

100

80

40
20

60

160
140
120

200
180

-40 0-20 20 8040 60 100

GROUND PIN CURRENT vs. TEMPERATURE

MAX8867/8-09

TEMPERATURE (°C)

GROUND PIN CURRENT (µA)

MAX886_EUK50

I

LOAD

= 50mA

MAX886_EUK25

0

100

50

150

200

0 4020 60 80 140100 120 160

MAX886_EUK50

DROPOUT VOLTAGE vs. LOAD CURRENT

MAX8867/8-11

LOAD CURRENT (mA)

DROPOUT VOLTAGE (mV)

TA = +85°C

TA = -40°C

TA = +25°C

70

0

0.01 0.1 1 10010 1000

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

10

20

MAX8867/8-12

FREQUENCY (kHz)

PSRR (dB)

30

50

40

60

C

OUT

= 1µF

I

LOAD

= 50mA

C

BP

= 0.1µF

C

OUT

= 10µF

MAX8867/MAX8868

Low-Noise, Low-Dropout,

150mA Linear Regulators in SOT23

_______________________________________________________________________________________

5

1ms/div

C

OUT

= 10µF, CBP = 0.1µF, I

LOAD

= 10mA

MAX886_EUK25

10Hz TO 100kHz OUTPUT NOISE

V

OUT

50µV/div

MAX8867/8-16

3.01V

3.00V

2.99V

50mA

0mA

V

OUT

I

LOAD

MAX886_EUK30, VIN = V

OUT

+ 0.5V,

C

IN

= 10µF, I

LOAD

= 0mA TO 50mA

10µs/div

LOAD-TRANSIENT RESPONSE

MAX8867/8-19

100

0.01
0 80

100

12020 40 60 140

REGION OF STABLE C

OUT

ESR

vs. LOAD CURRENT

0.1

MAX8867/8-17

LOAD CURRENT (mA)

C

OUT

ESR (Ω)

1

10

STABLE REGION

C

OUT

= 1µF

C

OUT

= 10µF

3.01V

3.00V

2.99V

50mA

0mA

V

OUT

I

LOAD

MAX886_EUK30, VIN = V

OUT

+ 0.1V,

C

IN

= 10µF, I

LOAD

= 0mA TO 50mA

10µs/div

LOAD-TRANSIENT RESPONSE

NEAR DROPOUT

MAX8867/8-20

____________________________Typical Operating Characteristics (continued)

(VIN= V

OUT(NOMINAL)

+ 0.5V, CIN= 1µF, C

OUT

= 1µF, CBP= 0.01µF, TA= +25°C, unless otherwise noted.)

4V
3V

3.001V

2.999V

V

OUT

MAX886_EUK30, I

LOAD

= 50mA

100µs/div

LINE-TRANSIENT RESPONSE

MAX8867/8-18

V

IN

V

OUT

V

SHDN

NO LOAD

500µs/div

MAX8868

ENTERING SHUTDOWN

MAX8867/8-25

2V

0V

0V

1V

0V

0V

2V

2V

5µs/div

MAX886_EUK25

SHUTDOWN EXIT DELAY

MAX8867-21

I

LOAD

= 50mA

V

SHDN

V

OUT

CBP = 0.01µF

CBP = 0.1µF

0V

0V

4V

2V

2V

5µs/div

MAX886_EUK50

SHUTDOWN EXIT DELAY

MAX8867-23

I

LOAD

= 50mA

V

SHDN

V

OUT

CBP = 0.01µF

CBP = 0.1µF

_______________Detailed Description

The MAX8867/MAX8868 are low-noise, low-dropout,
low-quiescent-current linear regulators designed pri­marily for battery-powered applications. The parts are
available with preset output voltages varying from 2.5V
to 5.0V in 100mV increments. These devices can sup­ply loads up to 150mA. As illustrated in Figure 1, the
MAX8867/MAX8868 consist of a 1.25V reference, error
amplifier, P-channel pass transistor, and internal feed­back voltage divider.

The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares
this reference with the feedback voltage and amplifies
the difference. If the feedback voltage is lower than the
reference voltage, the pass-transistor gate is pulled
lower, which allows more current to pass to the output
and increases the output voltage. If the feedback volt­age is too high, the pass-transistor gate is pulled up,
allowing less current to pass to the output. The output
voltage is fed back through an internal resistor voltage
divider connected to the OUT pin.

MAX8867/MAX8868

Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23

6 _______________________________________________________________________________________

______________________________________________________________Pin Description

PIN

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.

SHDN

1

FUNCTIONNAME

Ground. This pin also functions as a heatsink. Solder to a large pad or the circuit-board ground plane to
maximize power dissipation.

GND2

Regulator Output. Sources up to 150mA. Bypass with a 1µF (<0.2Ω typical ESR) capacitor to GND.OUT4

Regulator Input. Supply voltage can range from 2.5V to 6.5V. Bypass with a 1µF capacitor to GND (see

Capacitor Selection and Regulator Stability

section).

IN3

Reference-Noise Bypass. Bypass with a low-leakage, 0.01µF ceramic capacitor for reduced noise at the
output.

BP5

SHUTDOWN

AND POWER-ON

CONTROL

ERROR

AMP

1.25V
REF

P

*

OUT

BP

* AUTO-DISCHARGE, MAX8868 ONLY

GND

IN

SHDN

MAX8867
MAX8868

MOS DRIVER

WITH I

LIMIT

THERMAL

SENSOR

REVERSE
BATTERY

PROTECTION

N

Figure 1. Functional Diagram

MAX8867/MAX8868

Low-Noise, Low-Dropout,

150mA Linear Regulators in SOT23

_______________________________________________________________________________________ 7

An external bypass capacitor connected to the BP pin
reduces noise at the output. Additional blocks include a
current limiter, reverse battery protection, thermal sen­sor, and shutdown logic. The MAX8868 also includes
an auto-discharge function, which actively discharges
the output voltage to ground when the device is placed
in shutdown mode.

Output Voltage

The MAX8867/MAX8868 are supplied with factory-set
output voltages from 2.5V to 5V, in 100mV increments.
Except for the MAX886_EUK29 and the MAX886_EUK32
(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

).

Internal P-Channel Pass Transistor

The MAX8867/MAX8868 feature a 1.1Ω typical P-chan­nel MOSFET pass transistor. This provides several
advantages over similar designs using PNP pass tran­sistors, including longer battery life. The P-channel
MOSFET requires no base drive, which reduces quies­cent current considerably. PNP-based regulators waste
considerable current in dropout when the pass transis­tor saturates. They also use high base-drive currents
under large loads. The MAX8867/MAX8868 do not suf­fer from these problems and consume only 100µA of
quiescent current whether in dropout, light-load, or
heavy-load applications (see the

Typical Operating

Characteristics

).

Current Limit

The MAX8867/MAX8868 include a current limiter, which
monitors and controls the pass transistor’s gate voltage,
limiting the output current to 390mA. For design purposes,
consider the current limit to be 160mA minimum to 500mA
maximum. The output can be shorted to ground for an
indefinite amount of time without damaging the part.

Thermal-Overload Protection

Thermal-overload protection limits total power dissipa­tion in the MAX8867/MAX8868. When the junction tem­perature exceeds TJ= +170°C, the thermal sensor
signals the shutdown logic, turning off the pass transis­tor and allowing the IC to cool. The thermal sensor will
turn the pass transistor on again after the IC’s junction
temperature cools by 20°C, resulting in a pulsed output
during continuous thermal-overload conditions.

Thermal-overload protection is designed to protect the
MAX8867/MAX8868 in the event of fault conditions. For
continual operation, do not exceed the absolute maxi­mum junction-temperature rating of TJ= +150°C.

Operating Region and Power Dissipation

The MAX8867/MAX8868’s maximum power dissipation
depends on the thermal resistance of the case and cir­cuit board, the temperature difference between the die
junction and ambient air, and the rate of air flow. The
power dissipation across the device is P = I

OUT(VIN

-

V

OUT

). The maximum power dissipation is:

P

MAX

= (TJ- TA) / (θJB+ θBA)

where TJ- TAis the temperature difference between the
MAX8867/MAX8868 die junction and the surrounding
air, θJB(or θJC) is the thermal resistance of the pack­age, and θBAis the thermal resistance through the
printed circuit board, copper traces, and other materi­als to the surrounding air.

The GND pin of the MAX8867/MAX8868 performs the
dual function of providing an electrical connection to
ground and channeling heat away. Connect the GND
pin to ground using a large pad or ground plane.

Reverse Battery Protection

The MAX8867/MAX8868 have a unique protection
scheme that limits the reverse supply current to 1mA
when either VINor V

SHDN

falls below ground. Their cir­cuitry monitors the polarity of these two pins and dis­connects the internal circuitry and parasitic diodes
when the battery is reversed. This feature prevents
device damage.

Noise Reduction

An external 0.01µF bypass capacitor at BP, in conjunction
with an internal 200kΩ resistor, creates a 80Hz lowpass
filter for noise reduction. The MAX8867/MAX8868 exhibit
30µV

RMS

of output voltage noise with CBP= 0.01µF

and C

OUT

= 10µF. Start-up time is minimized by a
power-on circuit that pre-charges the bypass capacitor.
The

Typical Operating Characteristics

show graphs of
Noise vs. BP Capacitance, Noise vs. Load Current, and
Output Noise Spectral Density.

__________Applications Information

Capacitor Selection and

Regulator Stability

Normally, use a 1µF capacitor on the MAX8867/
MAX8868’s input and a 1µF to 10µF capacitor on the
output. Larger input capacitor values and lower ESRs
provide better supply-noise rejection and line-transient
response. Reduce noise and improve load-transient
response, stability, and power-supply rejection by
using large output capacitors. For stable operation over
the full temperature range and with load currents up to
150mA, a minimum of 1µF is recommended. Note that
some ceramic dielectrics exhibit large capacitance and

MAX8867/MAX8868

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.

8

_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

ESR variation with temperature. With dielectrics such as
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 0.01µF bypass capacitor at BP for low output volt­age noise. Increasing the capacitance will slightly
decrease the output noise, but increase the start-up time.
Values above 0.1µF provide no performance advantage
and are not recommended (see Shutdown Exit Delay
graph in the

Typical Operating Characteristics

).

PSRR and Operation from

Sources Other than Batteries

The MAX8867/MAX8868 are designed to deliver low
dropout voltages and low quiescent currents in battery­powered systems. Power-supply rejection is 63dB at
low frequencies and rolls off above 10kHz. See the
Power-Supply Rejection Ratio Frequency graph in the

Typical Operating Characteristics

.

When operating from sources other than batteries,
improved supply-noise rejection and transient response
can be achieved by increasing the values of the input
and output bypass capacitors, and through passive filter­ing techniques. The

Typical Operating Characteristics

show the MAX8867/MAX8868’s line- and load-transient
responses.

Load-Transient Considerations

The MAX8867/MAX8868 load-transient response
graphs (see

Typical Operating Characteristics

) show
two components of the output response: a DC shift
from the output impedance due to the load current
change, and the transient response. A typical transient
for a step change in the load current from 0mA to 50mA
is 12mV. Increasing the output capacitor’s value and
decreasing the ESR attenuates the overshoot.

Input-Output (Dropout) Voltage

A regulator’s minimum input-output voltage differential
(or dropout voltage) determines the lowest usable sup­ply voltage. In battery-powered systems, this will deter­mine the useful end-of-life battery voltage. Because the
MAX8867/MAX8868 use a P-channel MOSFET pass
transistor, their dropout voltage is a function of drain-to­source on-resistance (R

DS(ON)

) multiplied by the load

current (see

Typical Operating Characteristics

).

___________________Chip Information

________________________________________________________Package Information

TRANSISTOR COUNT: 247
SUBSTRATE CONNECTED TO GND

SOTPO3L.EPS