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参数资料
| 型号： | FAN2103MPX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 12/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 25MLP |
| 标准包装： | 1 |
| 系列： | TinyBuck™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3 V ~ 21 V |
| 输入电压： | 3 V ~ 24 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 600kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 是 |
| 工作温度： | -10°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 25-MLP |
| 包装： | 标准包装 |
| 供应商设备封装： | 25-MLP（5x6） |
| 产品目录页面： | 1214 (CN2011-ZH PDF) |
| 配用： | FEB207-ND - BOARD EVAL FOR FAN2103 |
| 其它名称： | FAN2103MPXDKR |
Because the FAN2103 employs summing current-mode
Table 1. Fault / Restart Provisioning
architecture, Type-2 compensation can be used for
many applications. For applications that require wide
loop bandwidth and/or use very low-ESR output
EN pin
Pull to GND
Controller / Restart State
OFF (disabled)
No restart – latched OFF (after V CC
V CC
t DELAY (ms) = 3.9 ? C(nf)
capacitors, Type-3 compensation may be required.
R RAMP provides feedforward compensation for changes
in V IN . With a fixed R RAMP value, the modulator gain
increases as V IN is reduced, which could make it difficult
to compensate the loop. For designs with low input
voltages (3 V to 6.5 V), it is recommended that a
separate R RAMP and the compensation component
values are used as compared to designs with V IN
between 6.5 V and 24 V.
Protection
The converter output is monitored and protected against
extreme overload, short-circuit, over-voltage, and under-
voltage conditions.
An internal “Fault Latch” is set for any fault intended to
shut down the IC. When the fault latch is set, the IC
discharges V OUT by enhancing the low-side MOSFET
until FB<0.25 V. The MOSFET is not turned on again
unless FB>0.5 V. This behavior discharges the output
without causing undershoot (negative output voltage).
comes up)
Open Immediate restart after fault
New soft-start cycle after:
Cap to GND
With EN left open, restart is immediate.
If auto-restart is not desired, tie the EN pin to the VCC pin
or pull it high after V CC comes up with a logic gate to keep
the 1 μA current sink from discharging EN to 1.1 V.
0.25/0.5V
FB
FAULT
PWM LATCH
PWM GATE
DRIVE
Figure 25.
Fault Latch with Delayed Auto-Restart
Figure 24. Latched Fault Response
Under-Voltage Shutdown
If FB remains below the under-voltage threshold for 16
consecutive clock cycles, the fault latch is set and the
converter shuts down. This fault is prevented from
setting the fault latch during soft-start.
Over-Voltage Protection / Shutdown
If FB exceeds 115% ? V REF for two consecutive clock
cycles, the fault latch is set and shutdown occurs.
A shorted high-side MOSFET condition is detected
when SW voltage exceeds ~0.7 V while the low-side
Over-Temperature Protection
FAN2103 incorporates an over-temperature protection
circuit that sets the fault latch when a die temperature of
about 160°C is reached. The IC is allowed to restart
when the die temperature falls below 130°C.
Power Good (PGOOD) Signal
PGOOD is an open-drain output that asserts LOW when
V OUT is out of regulation, as measured at the FB pin
(thresholds are specified in the Electrical Specifications
section). PGOOD does not assert HIGH until the fault
latch is enabled (T1.0).
PCB Layout
MOSFET is fully enhanced. The fault latch is set
immediately upon detection.
The two fault protection circuits above are active all the
time, including during soft-start.
Auto-Restart
After a fault, EN is discharged with 1 μA to a 1.1 V
threshold before the 800 K Ω pull-up is restored. A new
soft-start cycle begins when EN charges above 1.35 V.
Depending on the external circuit, the FAN2103 can be
provisioned to remain latched-off or automatically restart
after a fault.
Figure 26. Recommended PCB Layout
? 2007 Fairchild Semiconductor Corporation
FAN2103 ? Rev. 1.0.8
12
www.fairchildsemi.com
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相关代理商/技术参数 |
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|---|---|
| FAN2103MPX_12 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:3 A, 24 V Input, Integrated Synchronous Buck Regulator |
| FAN2106 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:3-24V Input, 6A, High-Efficiency, Integrated Synchronous Buck Regulator |
| FAN2106_08 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:TinyBuck⑩ 6A, 24V Input, Integrated Synchronous Buck Regulator |
| FAN2106_09 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:3-24V Input, 6A, High-Efficiency, Integrated Synchronous Buck Regulator |
| FAN2106_12 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:TinyBucka?￠ 3-24 V Input, 6 A, High-Efficiency, Integrated Synchronous Buck Regulator |
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