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MAX8873SEUK+T

P1-P3P4-P6P7-P8
_______________General Description
The MAX8873T/S/R and MAX8874T/S/R low-dropout lin-
ear regulators operate from a +2.5V to +6.5V input
range and deliver up to 120mA. A PMOS pass transis-
tor allows the low, 82µA supply current to remain inde-
pendent of load, making these devices ideal for
battery-operated portable equipment such as cellular
phones and cordless phones.
The devices feature Dual Mode™ operation: their out-
put voltage is preset (at 3.15V for the T versions, 2.84V
for the S versions, or 2.80V for the R versions) or can be
adjusted with an external resistor divider. Total error on
the output is ±3.5%. Output voltages are set on the low
side of popular ranges so that power drain is minimized
for longer battery life. Other features include low-power
shutdown, short-circuit protection, thermal shutdown
protection, and reverse battery protection. The
MAX8874 also includes an auto-discharge function,
which actively discharges the output voltage to ground
when the device is placed in shutdown mode. Both
devices come in a miniature 5-pin SOT23 package.
For dual versions, refer to the MAX8865/MAX8866 data
sheet. For low-noise versions with 30µV
RMS
output
noise, refer to the MAX8877/MAX8878.
________________________Applications
Cordless Telephones Modems
PCS Telephones Hand-Held Instruments
Cellular Telephones Palmtop Computers
PCMCIA Cards Electronic Planners
____________________________Features
♦ LP2980 Pin-Compatible SOT23 Package
♦ Low, 55mV Dropout Voltage at 50mA I
OUT
(130mV at 120mA)
♦ Low, 73µA No-Load Supply Current
Low, 82µA Operating Supply Current (even in
dropout)
♦ Miniature External Components
♦ Thermal Overload Protection
♦ Output Current Limit
♦ Reverse Battery Protection
♦ Dual Mode Operation: Fixed or Adjustable
(1.25V to 6.5V) Output
♦ Low-Power Shutdown
MAX8873T/S/R, MAX8874T/S/R
Low-Dropout, 120mA Linear Regulators
________________________________________________________________
Maxim Integrated Products
1
SOT23-5
TOP VIEW
GND
SET
SHDN
1
5
OUT
IN
MAX8873
MAX8874
2
3
4
__________________Pin Configuration
MAX8873
MAX8874
OUT
GND SET
IN
SHDN
C
OUT
1µF
C
IN
1µF
BATTERY
OUTPUT
VOLTAGE
__________Typical Operating Circuit
19-1257; Rev 1; 3/98
PART
MAX8873TEUK-T
MAX8873SEUK-T
MAX8874TEUK-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
______________Ordering Information
SOT TOP
MARK
ABZH
ABZI
ABZJ
MAX8874SEUK-T -40°C to +85°C 5 SOT23-5 ABZK
Dual Mode is a trademark of Maxim Integrated Products.
MAX8873REUK-T -40°C to +85°C 5 SOT23-5 ABZL
MAX8874REUK-T -40°C to +85°C 5 SOT23-5 ABZM
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX8873T/S/R, MAX8874T/S/R
Low-Dropout, 120mA Linear Regulators
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +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.
V
IN
to GND ..................................................................-7V to +7V
Output Short-Circuit Duration ............................................Infinite
SET to GND..............................................................-0.3V to +7V
SHDN
to GND..............................................................-7V to +7V
SHDN
to IN .................................................................-7V to 0.3V
OUT 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
JA
..................................................................................140°C/W
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
Ω
300
Shutdown Discharge
Resistance (MAX8874)
0.05
0 100
I
SHDN
SHDN Input Bias Current
V
0.4V
IL
SHDN Input Threshold
2.0V
IH
µV
RMS
220
Output Voltage Noise
350
%/mA
0.011 0.030
%/V-0.15 0 0.15∆V
LNR
Line Regulation
mV
55 120
Dropout Voltage (Note 5)
V2.5 6.5V
IN
Input Voltage (Note 2)
1.1
µA
73 150
I
Q
Ground Pin Current
3.05 3.15 3.25
V
OUT
Output Voltage
VV
SET
6.5V
OUT
Adjustable Output Voltage
Range (Note 3)
mA120Maximum Output Current
UNITSMIN TYP MAXSYMBOLPARAMETER
V
SHDN
= V
IN
C
OUT
= 100µF
I
OUT
= 0mA
V
IN
= 2.5V to 6.5V, SET tied to OUT,
I
OUT
= 1mA
0mA ≤ I
OUT
≤ 50mA,
SET = GND
I
OUT
= 50mA
CONDITIONS
mA280I
LIM
Current Limit (Note 4)
V
MAX887_T
10Hz to 1MHz
I
OUT
= 1mA
SET = GND
C
OUT
= 1µF
MAX887_S 2.75 2.84 2.93
I
OUT
= 50mA 82
0.02
µA
0.0001 1
I
QSHDN
Shutdown Supply Current V
OUT
= 0V
T
A
= T
MAX
T
A
= +25°C
T
A
= T
MAX
T
A
= +25°C
nA
MAX887_R 2.70 2.80 2.88
I
OUT
= 0mA to 50mA
0.006
∆V
LDR
Load Regulation
SET tied to OUT
SET = GND
SHUTDOWN
MAX8873T/S/R, MAX8874T/S/R
Low-Dropout, 120mA Linear Regulators
_______________________________________________________________________________________
3
__________________________________________Typical Operating Characteristics
(V
IN
= +3.6V, C
IN
= 1µF, C
OUT
= 1µF, MAX887_T, T
A
= +25°C, unless otherwise noted.)
UNITSMIN TYP MAXSYMBOLPARAMETER CONDITIONS
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +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 cor-
relation using Statistical Quality Control (SQC) methods.
Note 2: Guaranteed by line-regulation test.
Note 3: Adjustable mode only.
Note 4: For design purposes, the current limit should be considered 120mA minimum to 420mA maximum.
Note 5: The dropout voltage is defined as (V
IN
- V
OUT
) when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 2V.
T
SHDN
°CThermal Shutdown Temperature 170
∆T
SHDN
°CThermal Shutdown Hysteresis 20
SET Input Leakage Current
(Note 3)
nA
0.015 2.5
I
SET
V
SET
= 1.3V
SET Reference Voltage (Note 3) V
1.225 1.25 1.275
V
SET
V
IN
= 2.5V to 6.5V,
I
OUT
= 1mA
SET INPUT
THERMAL PROTECTION
T
A
= +25°C
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= T
MAX
0.5
1.215 1.25 1.285
3.00
3.05
3.10
3.15
3.20
3.25
3.30
0 20 60 100
120
OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX8873/74-01
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
40 80
100
50
0 20 60
120
100
SUPPLY CURRENT
vs. LOAD CURRENT
60
90
MAX8873/74-02
LOAD CURRENT (mA)
SUPPLY CURRENT (µA)
40
80
80
70
95
55
85
75
65
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 1 2 4 6 7
OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX8873/74-03
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3 5
NO LOAD
P1-P3P4-P6P7-P8

MAX8873SEUK+T

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Buy MAX8873SEUK+T
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 120mA Linear Regulator
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New from this manufacturer.
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