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| 型号： | AS1335-BTDT-100 |
| 厂商： | ams |
| 文件页数： | 11/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1V 1.5A 10WFDFN |
| 标准包装： | 1,000 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1V |
| 输入电压： | 2.6 V ~ 5.25 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-TDFN（3x3） |
AS1335
Datasheet - D e t a i l e d D e s c r i p t i o n
Short-Circuit Protection
This frequency reduction ensures that the inductor current has more time to decay, thus preventing runaway condi-
tions. f OSC will progressively increase to 1.5MHz when V OUT > 0V or V FB > 0V.
Dropout Operation
The AS1335 is working with a low input-to-output voltage difference by operating at 100% duty cycle. In this state, the
PMOS is always on. This is particularly useful in battery-powered applications with a 3.3V output.
The AS1335 allows the output to follow the input battery voltage as it drops below the regulation voltage. The quies-
cent current in this state rises minimally to only 400μA (max), which aids in extending battery life. This dropout (100%
duty-cycle) operation achieves long battery life by taking full advantage of the entire battery range.
The input voltage requires maintaining regulation and is a function of the output voltage and the load. The difference
between the minimum input voltage and the output voltage is called the dropout voltage. The dropout voltage is there-
fore a function of the on-resistance of the internal PMOS (R DS(ON)PMOS ) and the inductor resistance (DCR) and this is
proportional to the load current.
Note: At low V IN values, the R DS(ON) of the P-channel switch increases (see Electrical Characteristics on page 4) .
Therefore, power dissipation should be taken in consideration.
Shutdown
Connecting EN to GND or logic low places the AS1335 in shutdown mode and reduces the supply current to 0.1μA. In
shutdown the control circuitry and the internal NMOS and PMOS turn off and SW becomes high impedance discon-
necting the input from the output. The output capacitance and load current determine the voltage decay rate. For nor-
mal operation connect EN to V IN or logic high.
Note: Pin EN should not be left floating.
Power-OK Functionality
The AS1335’s power-ok circuitry offers a 215ms delayed power-ok signal. As long as the output voltage is outside of
the power-ok regulation window the POK pin drives an open-drain low signal. As soon as the output voltage is within
the regulation window, the internal open-drain MOSFET is turned off and the POK pin can be externally pulled to high.
The output of the power-ok signal is delayed by 215ms.
RSI Signal
With the RSI signal the internal power-ok timer can be reseted or delayed. As long as the input to RSI is high the POK
signal remains low, regardless of the output voltage condition.
Thermal Shutdown
Due to its high-efficiency design, the AS1335 will not dissipate much heat in most applications. However, in applica-
tions where the AS1335 is running at high ambient temperature, uses a low supply voltage, and runs with high duty
cycles (such as in dropout) the heat dissipated may exceed the maximum junction temperature of the device.
As soon as the junction temperature reaches approximately 150oC the AS1335 goes in thermal shutdown. In this mode
the internal PMOS & NMOS switch are turned off. The device will power up again, as soon as the temperature falls
below +125°C again.
Revision 1.03
10 - 18
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相关代理商/技术参数 |
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| AS1335-BTDT-AD | 功能描述:IC REG BUCK SYNC ADJ 10WFDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| AS1336A/B EB | 制造商:AMS 功能描述:BOARD EVAL FOR AS1336A/B |
| AS1336A/B-EB | 制造商:ams 功能描述:AS1336A/B Evaluation Board |
| AS1336A-BQFT | 功能描述:IC REG BST SYNC ADJ 75MA 16TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| AS1336A-BQFT-AD | 制造商:AMS 功能描述:0 |
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