參數(shù)資料
型號(hào): MAX8867C/D25
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器
英文描述: 2.5 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, UUC5
封裝: DIE
文件頁數(shù): 10/11頁
文件大?。?/td> 550K
代理商: MAX8867C/D25
Z5U and Y5V, it may be necessary to use 2.2F or
more to ensure stability at temperatures below -10°C.
With X7R or X5R dielectrics, 1F should be sufficient at
all operating temperatures. Also, for high-ESR tantalum
capacitors, 2.2F or more may be needed to maintain
ESR in the stable region. A graph of the Region of
Stable COUT ESR vs. Load Current is shown in the
Typical Operating Characteristics.
Use a 0.01F bypass capacitor at BP for low output volt-
age noise. Increasing the capacitance will slightly
decrease the output noise, but increase the start-up time.
Values above 0.1F 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 battery-
powered 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 filter-
ing 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 sup-
ply voltage. In battery-powered systems, this will deter-
mine 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-to-
source on-resistance (RDS(ON)) multiplied by the load
current (see Typical Operating Characteristics).
Chip Information
TRANSISTOR COUNT: 247
SUBSTRATE CONNECTED TO GND
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
8
_______________________________________________________________________________________
_
Expanded Ordering Information
***Other xy between 2.5V and 5.0V are available in 100mV increments. Contact factory for other versions. Minimum order quantity is 25,000 units.
OUTPUT VOLTAGE (xy) CODE
SOT TOP MARK
REGULAR SOT23
THIN SOT23
PRESET
OUTPUT
VOLTAGE (V)
MAX8867
REGULAR
MAX8867
THIN
MAX8868
REGULAR
MAX8868
THIN
MAX886_EUK25-T
MAX886_EZK25-T
2.50
ACAY
ADQM
ACBF
ADQW
MAX886_EUK28-T
MAX886_EZK28-T
2.80
ACAZ
ADQO
ACBG
ADQX
MAX886_EUK29-T
MAX886_EZK29-T
2.84
ACBA
ADQP
ACBH
ADQY
MAX886_EUK30-T
MAX886_EZK30-T
3.00
ACBB
ADQQ
ACBI
ADQZ
MAX886_EUK32-T
MAX886_EZK32-T
3.15
ACBC
ADQR
ACBJ
ADRA
MAX886_EUK33-T
MAX886_EZK33-T
3.30
ACBD
ADQS
ACBK
ADRB
MAX886_EUK36-T
MAX886_EZK36-T
3.60
ACCZ
ADQT
ACDA
ADRC
MAX886_EUK50-T
MAX886_EZK50-T
5.00
ACBE
ADQV
ACBL
ADRD
Other xy***
x.y0
——
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