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參數(shù)資料
| 型號： | MAX1589EZT250-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Low-Input-Voltage, 500mA LDO Regulator with RESETin SOT and TDFN |
| 中文描述： | 2.5 V FIXED POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDSO6 |
| 封裝： | SC-74, MO-193, SOT-23, 6 PIN |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 312K |
| 代理商： | MAX1589EZT250-T |
M
capacitors to reduce noise and improve load-transient
response, stability, and power-supply rejection.
The output capacitor’s equivalent series resistance
(ESR) affects stability and output noise. Use output
capacitors with an ESR of 30m
Ω
or less to ensure sta-
bility and optimize 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 MAX1589 as possible to minimize
the impact of PC board trace inductance.
Noise, PSRR, and Transient Response
The MAX1589 is designed to operate with low dropout
voltages and low quiescent currents in battery-powered
systems, while still maintaining good noise, transient
response, and AC rejection. See the
Typical Operating
Characteristics
for a plot of Power-Supply Rejection
Ratio (PSRR) vs. 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.
The MAX1589 load-transient response (see the
Typical
Operating Characteristics
) shows two components of
the output response: a near-zero DC shift from the out-
put impedance due to the load-current change, and the
transient response. A typical transient response for a
step change in the load current from 100mA to 500mA
is 35mV. Increasing the output capacitor’s value and
decreasing the ESR attenuates the overshoot.
Input-Output (Dropout) Voltage
A regulator’s minimum input-output voltage difference
(dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines
the useful end-of-life battery voltage. Because the
MAX1589 uses a P-channel MOSFET pass transistor, its
dropout voltage is a function of drain-to-source on-resis-
tance (R
DS(ON)
= 0.33
Ω
) multiplied by the load current
(see the
Typical Operating Characteristics
):
V
DROPOUT
= V
IN
- V
OUT
= 0.33
Ω
I
OUT
The MAX1589 ground current reduces to 70μA in dropout.
Chip Information
TRANSISTOR COUNT: 2556
PROCESS: BiCMOS
Low-Input-Voltage, 500mA LDO Regulator
with
RESET
in SOT and TDFN
8
_______________________________________________________________________________________
Figure 2. Power Operating Regions for 6-Pin SOT23: Maximum
Output Current vs. Input Voltage
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
(POWER DISSIPATION LIMIT)
(V
IN
- V
OUT
) (V)
M
2.5
2.0
1.5
1.0
0.5
0
3.0
MAXIMUM RECOMMENDED
OUTPUT CURRENT 6-PIN SOT23
T
A
= +85
°
C
T
A
= +70
°
C
M
100
200
300
400
500
600
0
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
(POWER DISSIPATION LIMIT)
(V
IN
- V
OUT
) (V)
M
2.5
2.0
1.5
1.0
0.5
0
3.0
MAXIMUM RECOMMENDED
OUTPUT CURRENT 6-PIN TDFN
T
A
= +85
°
C
M
100
200
300
400
500
600
0
Figure 3. Power Operating Region for 6-Pin TDFN: Maximum
Output Current vs. Input Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1589EZT300+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1589EZT300+T | 功能描述:低壓差穩(wěn)壓器 - LDO 500mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX1589EZT300-T | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX1589EZT-T | 制造商:Maxim Integrated Products 功能描述:500MA LOW VOLTAGE LINEAR REGULATOR IN TINY QF - Tape and Reel |
| MAX158ACAI | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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