- 您现在的位置：买卖IC网 > PDF目录20722 > MAX8634ELA+T (Maxim Integrated)IC REG LDO ADJ .3A 8UDFN PDF资料下载
参数资料
| 型号： | MAX8634ELA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .3A 8UDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.09V @ 100mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 300mA |
| 电流 - 限制（最小）： | 400mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN |
| 供应商设备封装： | 8-uDFN（2x2） |
| 包装： | 带卷 (TR) |
Dual 300mA Pin-Programmable LDO
Linear Regulators
Detailed Description
The MAX8633–MAX8636 are low-power, low-quiescent
current, low-dropout linear regulators designed primari-
ly for battery-powered applications. Pin-programmable
inputs allow easy configuration of OUT1 and OUT2 volt-
ages without external 1% resistors. The devices can
supply up to 300mA from each output, provided they do
not exceed the maximum package power dissipation.
The MAX8633–MAX8636 regulate OUT1 and OUT2 by
using simple control loops incorporating internal 1.50V
reference, error amplifiers, p-channel pass transistors,
and internal feedback voltage-dividers. Reset circuitry
ensures controlled startup and provides undervoltage
lockout. The MAX8633 –MAX8636 determine output
voltages at OUT1 and OUT2 based on the state of P1
and P2 (P for MAX8634) at power-on.
RESET (MAX8633)
The MAX8633 features an integrated reset circuit.
RESET is logic-low on power-up and goes high imped-
ance 150ms after OUT2 reaches 87% of its nominal
regulation voltage. During power-down or undervoltage
conditions, RESET is driven low when OUT2 falls below
82.5% of its nominal regulation voltage.
Output Programming Inputs (P1, P2, P)
Output voltages for OUT1 and OUT2 are determined at
power-up by the state of P1 and P2. Programming
inputs P1 and P2 eliminate external 1% feedback resis-
tors while providing nine preset output-voltage options
(see Table 1 for the MAX8633; see Table 3 for the
MAX8634) at power-on. Subsequent changes to P, or
P1 and P2 do not change the output voltages unless
the supply power is cycled, or all SHDN inputs are
simultaneously driven low to shut down the device.
Power-On Sequence
(MAX8633/MAX8636 Only)
The MAX8633/MAX8636 provide a single shutdown input
( SHDN ) to disable OUT1 and OUT2. During power-on,
inrush current is limited by a built-in startup sequence. At
power-on, OUT1 is disabled until OUT2 reaches 87% of
its regulation voltage, then OUT1 is enabled.
If SHDN is connected to IN and the input voltage drops
below the undervoltage-lockout (UVLO) threshold, both
LDOs are disabled. The LDOs will not power on again
until both of the following conditions are satisfied:
1) The input voltage is raised above the UVLO thresh-
old 2.25V (typ).
2) OUT2 is discharged below 1.2V (typ).
Internal p-Channel Pass Transistor
The MAX8633–MAX8636 feature 0.9 Ω p-channel MOSFET
pass transistors; p-channel MOSFETs provide several
advantages over similar designs using pnp pass
transistors, resulting in higher efficiency and longer bat-
tery life. MOSFET pass transistors do not require base
drive current of pnps, reducing quiescent current
Table 2. Output-Voltage Programming
(MAX8634)
MAX8635/MAX8636).
The MAX8634 provides three preset output-voltage
options with one programming input (see Table 2). The
MAX8633–MAX8636 configure output voltages at OUT1
and OUT2 based on the state of P1 and P2 (P for
P
Open
GND
IN
OUT1 (V)
2.85
3.00
2.60
OUT2 (V)
2.85
2.85
2.60
Table 1. Output-Voltage Programming
(MAX8633)
Table 3. Output-Voltage Programming
(MAX8635/MAX8636)
P1
Open
Open
Open
GND
GND
GND
IN
IN
IN
P2
Open
GND
IN
Open
GND
IN
Open
GND
IN
OUT1 (V)
2.80
2.90
3.00
3.00
2.80
2.60
2.90
2.80
3.00
(OUT2) (V)
1.50
1.50
1.50
1.60
1.80
1.85
1.85
2.60
2.80
P1
Open
Open
Open
GND
GND
GND
IN
IN
IN
P2
Open
GND
IN
Open
GND
IN
Open
GND
IN
OUT1 (V)
2.80
2.90
3.00
2.60
2.80
3.00
3.00
2.85
3.00
OUT2 (V)
1.50
1.50
1.50
1.80
1.80
2.50
2.80
2.85
3.00
8
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| NCV4274DS50R4G | IC REG LDO 5V .4A D2PAK |
| AISM-1210-R10M-T | INDUCTOR .10UH 20% 1210 |
| RBM06DCAH-S189 | CONN EDGECARD 12POS R/A .156 SLD |
| ABC40DRYS | CONN EDGECARD 80POS .100 DIP SLD |
| RCA14DRMD | CONN EDGECARD 28POS .125 SQ WW |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8634ETA+ | 制造商:Maxim Integrated Products 功能描述:REG LDO LIN FIX POS 2.6V/2.85V/3V 0.3A 8TDFN EP - Rail/Tube |
| MAX8634ETA+T | 功能描述:低压差稳压器 - LDO Dual 300mA Pin-Prog LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8635ELA+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8635ELA+T | 功能描述:低压差稳压器 - LDO Dual 300mA Pin-Prog LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8635ETA+ | 制造商:Maxim Integrated Products 功能描述:LDO REG 1.5V TO 3V 0.3A 8TDFN EP - Rail/Tube |
发布紧急采购，3分钟左右您将得到回复。