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參數(shù)資料
| 型號(hào)： | MAX8888EZK33-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low-Dropout, 300mA Linear Regulators in SOT23 |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO5 |
| 封裝： | MO-193, EIAJ SC-70, SOT-23, 5 PIN |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 221K |
| 代理商： | MAX8888EZK33-T |
put capacitors with an ESR of 0.1
or less to ensure sta-
bility and optimum transient response. Surface-mount
ceramic capacitors have very low ESR and are com-
monly available in values up to 10μF. Connect C
IN
and
C
OUT
as close to the MAX8887/MAX8888 as possible to
minimize the impact of PC board trace inductance.
Noise, PS RR, and T ransient Response
The MAX8887/MAX8888 are designed to operate with
low dropout voltages and low quiescent currents in bat-
tery-powered systems while still maintaining excellent
noise, transient response, and AC rejection. See the
Typical Operating Characteristics
for a plot of power-
supply rejection ratio (PSRR) versus frequency. When
operating from noisy sources, 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.
Input-Output (Dropout) V oltage
A regulator’s minimum input-to-output voltage differen-
tial (dropout voltage) determines the lowest usable sup-
ply voltage at which the output is regulated. In
battery-powered systems, this determines the useful
end-of-life battery voltage. The MAX8887/MAX8888 use
a P-channel MOSFET pass transistor. Its dropout volt-
age is a function of drain-to-source on-resistance
(R
DS(ON)
) multiplied by the load current (see the
Typical Operating Characteristics
).
V
DROPOUT
= V
IN
- V
OUT
= R
DS(ON)
I
OUT
Chip Information
TRANSISTOR COUNT: 620
PROCESS: BiCMOS
M
Low-Dropout, 300mA Linear Regulators in SOT23
_______________________________________________________________________________________
7
SHUTDOWN
LOGIC
ERROR
AMP
1.25V
REF
95%
REF
P
OUT
POK
GND
IN
SHDN
MAX8888
THERMAL
SENSOR
MOS DRIVER
WITH I
LIMIT
POK
Figure 1. Functional Diagram
0
100
200
300
400
0
1.0
2.0
3.0
0.5
1.5
(V
IN
- V
OUT
) (V)
2.5
3.5
4.0
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
(POWER DISSIPATION LIMIT)
M
V
O
=
V
O
=
V
O
=
MAXIMUM RECOMMENDED OUTPUT CURRENT
T
A
= +85
°
C
T
A
= +70
°
C
Figure 2. Power Operating Regions: Maximum Output Current
vs. Input Voltage
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