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參數(shù)資料
| 型號(hào)： | MAX8902A |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Noise 500mA LDO Regulators in a 2mm x 2mm TDFN Package |
| 中文描述： | 低噪聲500mA LDO穩(wěn)壓器，2mm x 2mm TDFN封裝 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 277K |
| 代理商： | MAX8902A |
Detailed Description
The MAX8902A/MAX8902B low-noise, low-dropout lin-
ear regulators deliver up to 500mA of output current
with only 16μV
RMS
of output noise in a 100kHz band-
width. These regulators maintain their output voltage
over a wide input range, requiring only 100mV of input-
to-output headroom at full load.
The MAX8902 maintains a low 80μA typical supply cur-
rent, independent of the load current and dropout volt-
age. The regulator control circuitry includes a
programmable soft-start circuit and short circuit,
reverse input, and thermal overload protection. Other
features include an enable input and a power-OK
(
POK
) output (MAX8902B only). A simplified functional
diagram is shown in Figure 1.
The MAX8902A output voltage can be set to 1.5V, 1.8V,
2.0V, 2.5V, 3.0V, 3.1V, 3.3V, 4.6V, or 4.7V using the
SELA and SELB inputs. The MAX8902B output voltage
can be set between 0.6V and 5.3V with an external
resistor voltage divider.
Enable (EN)
The MAX8902A/MAX8902B include an enable input,
EN. Pull EN low to shutdown the output, or drive EN
high to enable the output. If shutdown is not needed,
connect EN to IN.
M
Low-Noise 500mA LDO Regulators
in a 2mm x 2mm TDFN Package
_______________________________________________________________________________________
5
Pin Description
NAME
PIN
MAX8902A
MAX8902B
FUNCTION
1
IN
IN
Regulator Power Input. Connect IN to a supply from 1.7V to 5.5V. Bypass IN with a 4.7μF
ceramic capacitor to GND.
2
GND
GND
Ground
3
EN
EN
Enable Input. A logic-low drives the output low through a 3k
Ω
resistor and reduces the
supply current to less than 1μA. Drive logic-high or connect to IN for normal operation.
SELA
—
Output Voltage Select Input. Connect SELA to GND, IN, or leave unconnected. The states of
SELA and SELB are sampled when the regulator turns on and the output voltage is set as
shown in Table 2.
4
—
GS
Internally used. Connect GS to GND.
SELB
—
Output Voltage Select Input. Connect SELB to GND, IN, or leave unconnected. The states of
SELA and SELB are sampled when the regulator turns on and the output voltage is set as
shown in Table 2.
5
—
POK
Power-OK Output. Open-drain output that goes low when the output is above 91% of the
nominal regulation voltage.
POK
is high impedance in shutdown or when the output is below
the regulation voltage.
OUTS
—
Output Sense Input. Connect OUTS to the load at a point where accurate regulation is
required, or connect OUTS directly to OUT.
6
—
FB
Feedback Input. Connect FB to the center of a resistor voltage divider connected between
OUT and GND to set the output voltage. V
FB
regulates to 0.6V.
7
BP
BP
Bypass Input. Connect a 0.01μF ceramic capacitor from BP to OUT to achieve 16μV
RMS
output noise. Adjust the value of this capacitor to control the output slew rate during startup.
Slew Rate = (5V / ms) x (0.01μF / C
BP
)
8
OUT
OUT
Regulator Output. Sources up to 500mA at the output regulation voltage. Bypass with a 10μF
(< 0.03
Ω
ESR) capacitor to GND.
Exposed Paddle. Connect the exposed paddle to a ground plane to provide heat sinking.
—
EP
EP
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8902AATA+ | 制造商:Maxim Integrated Products 功能描述:LDO REGULATORS 制造商:Maxim Integrated Products 功能描述:LOW-NOISE 500MA LDO REGULATORS IN A 2MM X 2MM TDFN PACKAGE - Bulk |
| MAX8902AATA+T | 功能描述:低壓差穩(wěn)壓器 - LDO 500mA LDO Regulator 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8902AATAT | 制造商:MAXIM/DALLAS 功能描述: |
| MAX8902BATA/V+ | 制造商:Maxim Integrated Products 功能描述:LOW-NOISE 500MA LDO REGULATORS IN A 2MM X 2MM TDFN PACKAGE - Rail/Tube |
| MAX8902BATA/V+T | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA LDO Linear Regulator 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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