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参数资料
| 型号： | IRU3046CFTR |
| 厂商： | International Rectifier |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 24TSSOP |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 450kHz |
| 占空比： | 90% |
| 电源电压： | 5 V ~ 12 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 剪切带 (CT) |
| 产品目录页面： | 1384 (CN2011-ZH PDF) |
| 其它名称： | *IRU3046CFTR IRU3046CFCT |
IRU3046
PIN#
10,15
11,14
12
13
17
18
19
20
22
23
24
PIN SYMBOL
HDrv2, HDrv1
LDrv2, LDrv1
PGnd
V CL
VccLDO
V OUT3
Fb3
SS
V SEN33
PGood
Gnd
PIN DESCRIPTION
Output driver for the high side power MOSFET. Connect a diode, such as BAT54 or 1N4148,
from these pins to ground for the application when the inductor current goes negative
(Source/Sink), soft-start at no load and for the fast load transient from full load to no load.
Output driver for the synchronous power MOSFET.
This pin serves as the separate ground for MOSFET’s driver and should be connected to
the system’s ground plane. A high frequency capacitor (0.1 to 1 m F) must be connected
from Vcc, V CL , VcH1 and VcH2 pins to this pin for noise free operation.
Supply voltage for the low side output drivers.
Separate input supply for LDO controller.
Driver signal for the LDO’s external transistor.
LDO’s feedback pin, connected to a resistor divider to set the output voltage of LDO.
This pin provides soft-start for the switching regulator. An internal current source charges
an external capacitor that is connected from this pin to ground which ramps up the output
of the switching regulator, preventing it from overshooting as well as limiting the input
current. The converter can be shutdown by pulling this pin below 0.5V.
Sense the LDO input voltage for UVLO.
Power good pin. This pin is a collector output that switches Low when any of the outputs
are outside of the specified under voltage trip point.
Analog ground for internal reference and control circuitry. Connect to PGnd with a short
trace.
BLOCK DIAGRAM
Vcc
4
16 VcH1
V SEN33 22
10K
25uA
Bias
Generator
3V
1.25V
15 HDrv1
64uA Max
SS 20
POR
Vsen33
VcH1
VcH2
VccLDO
4.2V / 4.0V
2.5V / 2.3V
3.5V / 3.3V
3.5V / 3.3V
4.2V / 4.0V
UVLO
POR
13 V CL
PWM Comp1
1.25V
25K
Error Amp1
S
14 LDrv1
Fb1 21
25K
Ramp1
Set1
R
Q
SS>2V
Comp1
5
Two Phase
Reset Dom
9
VcH2
Oscillator
Rt 7
Ramp2
Set2
10 HDrv2
Sync
8
S
V REF 1
1.25V
25K
Error Amp2
PWM Comp2
Q
Vp2 2
25K
R
Reset Dom
Fb2 3
Fb2 Monitor Shut Down
0.5V
11 LDrv2
12 PGnd
Comp2
6
Fb1
PGood
POR
Fb2
23 PGood
Fb3
17 VccLDO
25K
1.25V
18 V OUT3
Fb3 19
25K
40mA LDO Controller
2V
24 Gnd
SS
Figure 2 - Block diagram of the IRU3046.
4
www.irf.com
Rev. 1.9
09/27/02
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IRU3046CFTRPBF | 制造商:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3047 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3047CW | 制造商:IRF 制造商全称:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3047CWTR | 功能描述:IC REG CTRLR BUCK PWM VM 20-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| IRU3048 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER |
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