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MAX8878EZK28+T

P1-P3P4-P6P7-P9P10-P10
__________________General Description
The MAX8877/MAX8878 low-noise, low-dropout linear
regulators operate from a 2.5V to 6.5V input and deliver
up to 150mA. These devices are pin-compatible with
the industry-standard '2982 and offer an improved
dropout voltage. Typical output noise is 30µV
RMS
, and
typical dropout is only 165mV at 150mA. The output
voltage is preset to voltages in the range of 1.5V to
5.0V, in 100mV increments.
Designed with an internal P-channel MOSFET pass
transistor, the MAX8877/MAX8878 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 ther-
mal-shutdown protection, and reverse battery protec-
tion. The MAX8878 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 pack-
ages.
________________________Applications
Cellular Telephones
Cordless Telephones
PCS Telephones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
____________________________Features
♦ Pin-Compatible with the Industry-Standard '2982
♦ 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
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX8877/MAX8878
Low-Noise, Low-Dropout, 150mA Linear
Regulators with '2982 Pinout
________________________________________________________________ Maxim Integrated Products 1
GND
BP
SHDN
1
5
OUT
IN
MAX8877
MAX8878
SOT23-5
REGULAR AND THIN
TOP VIEW
2
3
4
_____________________Pin Configuration
MAX8877
MAX8878
INPUT
2.5V TO 6.5V
IN OUT
SHDN
BP
GND
OUTPUT
PRESET
1.5V TO 5.0V
150mA
C
BP
0.01µF
C
OUT
3.3µF
C
IN
1µF
OFF
ON
____________Typical Operating Circuit
19-1301; Rev 2; 1/01
_________________Ordering Information
*Dice are tested at T
A
= +25°C only.
**xy is the output voltage code (see Expanded Ordering
Information table at end of data sheet).
PART**
TEMP.
RANGE
PIN-PACKAGE
MAX8877C/Dxy 0°C to +70°C Dice*
MAX8877EUKxy-T -40°C to +85°C 5 SOT23-5 Regular
MAX8877EZKxy-T -40°C to +85°C 5 SOT23-5 Thin
MAX8878C/Dxy 0°C to +70°C Dice*
MAX8878EUKxy-T -40°C to +85°C 5 SOT23-5 Regular
MAX8878EZKxy-T -40°C to +85°C 5 SOT23-5 Thin
MAX8877/MAX8878
Low-Noise, Low-Dropout, 150mA Linear
Regulators with '2982 Pinout
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(NOMINAL)
+ 0.5V or 2.5V (whichever is greater), T
A
= -40°C to +85°C, 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.
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 Regular (derate 7.1mW/°C above +70°C) ....571mW
SOT23-5 Thin (derate 9.1mW/°C above +70°C)..........727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
θ
JB
(Regular)..................................................................140°C/W
θ
JB
(Thin)........................................................................110°C/W
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
2.5 6.5 V
I
OUT
= 0.1mA, T
A
= +25°C, V
OUT
≥ 2.5V -1.4 1.4
I
OU T
= 0.1m A to 120m A, T
A
= - 40° C to + 85°C ,
V
OUT
≥ 2.5V
-3 2
I
OUT
= 0.1mA, T
A
= +25°C, V
OUT
< 2.5V -3 3
Output Voltage Accuracy
I
OUT
= 0.1mA to 120mA, T
A
= -40°C to +85°C,
V
OUT
< 2.5V
-3.5 3.5
%
Maximum Output Current 150 mA
Current Limit I
LIM
160 390 mA
No load 85 180
Ground Pin Current I
Q
I
OUT
= 150mA 100
µA
I
OUT
= 1mA 1.1
I
OUT
= 50mA 55 120
Dropout Voltage (Note 2)
I
OUT
= 150mA 165
mV
Line Regulation ∆V
LNR
V
IN
= 2.5V or (V
OUT
+ 0.1V) to 6.5V,
I
OUT
= 1mA
-0.15 0 0.15 %/V
Load Regulation ∆V
LDR
I
OUT
= 0.1mA to 120mA, C
OUT
= 1µF 0.01 0.04 %/mA
C
OUT
= 10µF 30
Output Voltage Noise e
n
f = 10Hz to 100kHz,
C
BP
= 0.01µF
C
OUT
= 100µF 20
µVRMS
SHUTDOWN
V
IH
V
IN
= 2.5V to 5.5V 2.0 V
SHDN Input Threshold
V
IL
V
IN
= 2.5V to 5.5V 0.4
T
A
= +25°C 0.01 100
SHDN Input Bias Current I
SHDN
V
SHDN
= V
IN
T
A
= +85°C 0.5
µA
T
A
= +25°C 0.01 1
Shutdown Supply Current I
Q
(
SHDN
)
V
OUT
= 0V
T
A
= +85°C 0.2
µA
T
A
= +25°C 30 150
Shutdown Exit Delay
(Note 3)
C
BP
= 0.1µF
C
OUT
= 1µF, no load
T
A
= -40°C to +85°C 300
µs
Resistance Shutdown Discharge MAX8878 only 300 Ω
MAX8877/MAX8878
Low-Noise, Low-Dropout, 150mA Linear
Regulators with '2982 Pinout
_______________________________________________________________________________________ 3
2.40
2.45
2.50
2.55
2.60
0 50 100 150
OUTPUT VOLTAGE vs. LOAD CURRENT
(MAX887_EUK25)
MAX8877-01
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
4.8
4.9
5.0
5.1
5.2
0 50 100 150
OUTPUT VOLTAGE vs. LOAD CURRENT
(MAX887_EUK50)
MAX8877-02
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
60
65
70
75
80
85
90
95
100
105
110
0 50 100 150
GROUND PIN CURRENT
vs. LOAD CURRENT
MAX8877-03
LOAD CURRENT (mA)
GROUND PIN CURRENT (µA)
MAX887_EUK50
MAX887_EUK25
0
40
20
80
60
100
120
0231 456
GROUND PIN CURRENT vs. INPUT VOLTAGE
(MAX887_EUK25)
MAX8877-04
INPUT VOLTAGE (V)
GROUND PIN CURRENT (µA)
NO LOAD
I
LOAD
= 50mA
0
40
20
80
60
100
120
0231 456
GROUND PIN CURRENT vs. INPUT VOLTAGE
(MAX887_EUK50)
MAX8877-05
INPUT VOLTAGE (V)
GROUND PIN CURRENT (µA)
NO LOAD
I
LOAD
= 50mA
0
2
1
4
3
5
6
0231 456
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX8877-06
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX887_EUK25
NO LOAD
MAX887_EUK50
__________________________________________Typical Operating Characteristics
(V
IN
= V
OUT(NOMINAL)
+ 0.5V or 2.5V (whichever is greater), C
IN
= 1µF, C
OUT
= 1µF, C
BP
= 0.01µF, T
A
= +25°C, unless otherwise
noted.)
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 V
IN
= V
OUT
+ 0.5V. (Only
applicable for V
OUT
= +2.5V to +5V.)
Note 3: Time needed for V
OUT
to reach 95% of final value.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT(NOMINAL)
+ 0.5V or 2.5V (whichever is greater), T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
=
+25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
THERMAL PROTECTION
Thermal Shutdown Temperature T
SHDN
155 °C
Thermal Shutdown Hysteresis ∆T
SHDN
15 °C
P1-P3P4-P6P7-P9P10-P10

MAX8878EZK28+T

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Buy MAX8878EZK28+T
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 150mA Linear Regulato
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