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| 型号： | AS1330-BTDT-AD |
| 厂商： | ams |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC ADJ 0.15A 8TDFN |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.8 V ~ 3.3 V |
| 输入电压： | 0.6 V ~ 3 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 4MHz |
| 电流 - 输出： | 150mA |
| 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： | 8-UFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-TDFN（2x2） |
| 其它名称： | AS1330-BTDT-ADDKR |
AS1330
Datasheet - D e t a i l e d D e s c r i p t i o n
Current Sensing
A signal representing the internal NMOS-switch current is summed with the slope compensator. The summed signal is compared to the error
amplifier output to provide a peak current control command for the PWM. Peak switch current is limited to approximately 650mA independent of
V IN or V OUT .
Zero Current Comparator
The zero current comparator monitors the inductor current to the output and shuts off the PMOS synchronous rectifier once this current drops to
20mA (approx.). This prevents the inductor current from reversing polarity and results in improved converter efficiency at light loads.
Anti-Ringing Control
Anti-ringing control circuitry prevents high-frequency ringing on pin SW as the inductor current approaches zero. This is accomplished by
damping the resonant circuit formed by the inductor and the capacitance on pin SW (C SW ).
Powersave Operation
In light load conditions, the integrated powersave feature removes power from all circuitry not required to monitor V OUT . When V OUT has
dropped approximately 1% from nominal, the device powers up and begins normal PWM operation.
C2 recharges, causing the AS1330 to re-enter powersave mode as long as the output load remains below the powersave threshold. The
frequency of this intermittent PWM is proportional to load current; i.e., as the load current drops further below the powersave threshold, the
AS1330 turns on less frequently. When the load current increases above the powersave threshold, the AS1330 will resume continuous,
seamless PWM operation.
Notes:
1. An optional capacitor (C FF ) between pins V OUT and FB in some applications can reduce V OUTp-p ripple and input
quiescent current during powersave mode. Typical values for C FF range from 15 to 220pF.
2. In powersave mode the AS1330 draws only 30 A from the output capacitor(s), greatly improving converter efficiency.
Shutdown
When pin EN is low the AS1330 is switched off and <1 A current is drawn from the battery; when pin EN is high the device is switched on. If EN
is driven from a logic-level output, the logic high-level (on) should be referenced to V OUT to avoid intermittently switching the device on.
In shutdown the battery input is disconnected from the output.
Thermal Overload Protection
To prevent the AS1330 from short-term misuse and overload conditions the chip includes a thermal overload protection. To block the normal
operation mode the device is turning the PFET and the NFET off in PWM mode as soon as the junction temperature exceeds 150°C. To resume
the normal operation the temperature has to drop below 140°C.
Note: Continuing operation in thermal overload conditions may damage the device and is considered bad practice.
Revision 1.06
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相关代理商/技术参数 |
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| AS1331-BTDT | 功能描述:IC REG BUCK BST SYNC ADJ 10TDFN 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 |
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