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參數(shù)資料
| 型號(hào)： | MAX6310EUK34D3+T |
| 廠(chǎng)商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | LEAD FREE, MO-178AA, SOT-23, 5 PIN |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 216K |
| 代理商： | MAX6310EUK34D3+T |
M
4A Ultra-Low-Input-Voltage
LDO Regulators
8
_______________________________________________________________________________________
Applications Information
Output Voltage Selection
The MAX8556/MAX8557 feature an adjustable output
voltage from 0.5V to 3.4V. Set the output voltage using
an external resistor-divider from the output to GND with
FB connected to the center tap as shown in Figures 1
and 2. Choose R3
≤
1k
for light-load stability.
Determine R2 using the following equation:
where V
OUT
is the desired output voltage and V
FB
is 0.5V.
Capacitor Selection and
Regulator Stability
Capacitors are required at the MAX8556/MAX8557
inputs and outputs for stable operation over the full
temperature range and with load currents up to 4A.
Connect 2 x 10μF capacitors between IN and GND and
2 x 10μF low equivalent-series-resistance (ESR) capac-
itors between OUT and GND. The input capacitor (C
IN
)
lowers the source impedance of the input supply. If the
MAX8556/MAX8557s’ input is close to the output of the
source supply, a smaller input capacitance can be
used. Otherwise, 2 x 10μF ceramic input capacitors are
recommended. The output capacitor’s (C
OUT
) ESR
affects output noise and may affect output stability. Use
output capacitors with an ESR of 0.05
or less to
ensure stability and optimum transient dropout. For
good output transient performance, use the following
formula to select a minimum output capacitance:
C
OUT
= I
OUT(MAX)
x 1μF/200mA
Noise, PSRR, and Transient Response
The MAX8556/MAX8557 are designed to operate with
low-dropout voltages and low quiescent currents while
still maintaining low noise, good transient response,
and high 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 MAX8556/
MAX8557 load-transient response graphs (see the
Typical Operating Characteristics) show two compo-
nents of the output response: a DC shift from the output
impedance due to the load current change, and the
transient response. A typical transient overshoot for a
step change in the load current from 40mA to 4A is
40mV. Use an output capacitance from 20μF to 120μF
to attenuate the overshoot.
R
R
x
V
V
OUT
FB
2
3
1
=
IN
7–11
13
14
15
POR
POR
GND
SHUTDOWN
OUT
FB
1–6
12
R1
100k
R2
2k
R3
1k
C1
2 x 10
μ
F
C2
2 x 10
μ
F
18
N.C.
U2
EN
ENABLED
V
1.7V TO 3.6V
V
OUT
1.5V AT 4A
MAX8557
Figure 2. MAX8557 Typical Application Circuit
IN
7–11
13
14
15
POK
POK
GND
SHUTDOWN
OUT
FB
1–6
12
R1
100k
R2
1.4k
R3
1k
C1
2 x 10
μ
F
C2
2 x 10
μ
F
18
N.C.
U1
EN
ENABLED
V
1.425V TO 3.6V
V
OUT
1.2V AT 4A
MAX8556
Figure 1. MAX8556 Typical Application Circuit
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| MAX6310EUK34D4-T | 功能描述:監(jiān)控電路 5-Pin Multiple-Input Programmable Reset ICs RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6310EUK35D1-T | 功能描述:監(jiān)控電路 5-Pin Multiple-Input Programmable Reset ICs RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6310EUK35D2-T | 功能描述:監(jiān)控電路 5-Pin Multiple-Input Programmable Reset ICs RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6310EUK35D3-T | 功能描述:監(jiān)控電路 5-Pin Multiple-Input Programmable Reset ICs RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6310EUK35D4-T | 功能描述:監(jiān)控電路 5-Pin Multiple-Input Programmable Reset ICs RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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