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| 型号： | MAX6772TAMD0+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/22页 |
| 文件大小： | 0K |
| 描述： | IC REG LINEAR 5V/ADJ 8-TDFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 稳压器/监控器 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 标准为 75 µs |
| 电压 - 阀值： | 4.375V，可调 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
MAX6765–MAX6774
Automotive Micropower Linear Regulators
with Supervisor
Table 3. ENABLE/ HOLD Truth Table/State Table
OPERATING
STATE
Initial State
Turn-On State
Hold
Setup State
Hold State
Off-State
ENABLE
Low
High
High
Low
Low
HOLD
Don’t care
Don’t care
Low
Low
High
(pulled high)
REGULATOR
OUTPUT
Off
On
On
On
Off
COMMENT
ENABLE is pulled to GND through an internal pulldown. HOLD is high
impedance (pulled up to OUT). Regulator output is disabled.
ENABLE is externally driven high turning the regulator output on.
HOLD is pulled up by OUT.
HOLD is externally pulled low while ENABLE remains high (latches
HOLD state).
ENABLE is driven low (or pulled low by an internal pulldown).
HOLD remains externally pulled low keeping the regulator output on.
HOLD is driven high (or pulled high by an internal pullup) while
ENABLE is low. Regulator output is shut off and ENABLE/
HOLD logic returns to the initial state.
Watchdog Timer (MAX6773/MAX6773B/
MAX6774/MAX6774B)
The MAX6773/MAX6774 include a watchdog timer that
asserts RESET if the watchdog input (WDI) does not
toggle within the watchdog timeout period, t WD (1.6s
(typ) for the MAX6773/MAX6774 and 50ms (typ) for the
MAX6773B/MAX6774B). RESET remains low for the
reset timeout period, t RP . If the watchdog is not updat-
ed for lengthy periods of time, the reset output appears
as a pulse train, asserted for the reset timeout period
and deasserted for the watchdog timeout period, until
WDI is toggled again. When RESET asserts, it stays low
for the entire reset timeout period ignoring any WDI
transitions. To prevent the watchdog from asserting
RESET , toggle WDI with a valid rising or falling edge
prior to t WD (min). The watchdog counter clears when
WDI toggles prior to t WD or when RESET asserts. The
watchdog resumes counting after RESET deasserts.
The watchdog timer cannot be disabled.
Thermal Protection
When the junction temperature exceeds T J = +160°C
(typ), an internal thermal sensor signals the shutdown
logic that turns off the pass transistor and allows the IC
mode. In preset voltage mode, internal trimmed feed-
back resistors set the internal linear regulator to +1.8V,
+2.5V, +3.3V, or +5V (see Table 2). Select preset-
voltage mode by connecting SET to ground. In
adjustable mode, select an output voltage between
+1.8V and +11V using two external resistors connected
as a voltage-divider to SET (see Figure 1). Set the output
voltage using the following equation:
V OUT = V SET (1 + R1/R2)
where V SET = 1.233V and the recommended value for
R2 is 50k Ω (maximum 100k Ω ).
RESETIN Threshold Selection
The MAX6769/MAX6770 feature an adjustable reset
threshold to monitor the voltage on RESETIN using a
resistive divider between the monitored voltage,
RESETIN and GND. See Figure 2. Use the following
formula to set the desired reset threshold:
V MON = V TH (1 + R3/R4)
where V TH is 1.085V for the M/S/Y/V versions and
1.147V for the L/T/Z/W versions.
to cool. The thermal sensor turns the pass transistor on
again after the IC’s junction temperature cools by 20°C
(typ), resulting in a cycled output during continuous
thermal-overload conditions. Thermal protection pro-
tects the MAX6765–MAX6774B in the event of a fault
condition. Never exceed the absolute maximum junction
V MON
R3
V IN
IN
MAX6769
MAX6770
temperature rating of T J = +150°C. See Figures 3 and 4
for the safe operating area.
Applications Information
Output-Voltage Selection
R4
RESETIN
GND
RESET
The MAX6767–MAX6774B feature dual-mode operation
and operate in either a preset or adjustable voltage
16
Figure 2. RESETIN Threshold Selection
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6772TAMD1+ | 制造商:Maxim Integrated Products 功能描述:REG STD LIN ADJ/FIX POS 1.8V TO 11V/5V 0.1A 8TDFN EP - Rail/Tube |
| MAX6772TAMD1+T | 功能描述:线性稳压器 - 标准 uPower Linear Regulator RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MAX6772TAMD2+ | 制造商:Maxim Integrated Products 功能描述:REG STD LIN ADJ/FIX POS 1.8V TO 11V/5V 0.1A 8TDFN EP - Rail/Tube |
| MAX6772TAMD2+T | 功能描述:线性稳压器 - 标准 uPower Linear Regulator RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MAX6772TAMD3+ | 制造商:Maxim Integrated Products 功能描述:REG STD LIN ADJ/FIX POS 1.8V TO 11V/5V 0.1A 8TDFN EP - Rail/Tube |
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