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參數(shù)資料
| 型號： | IRU3046CF |
| 廠商： | International Rectifier |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| 中文描述： | 雙同步PWM控制器，帶有均流電路和LDO控制器 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大小： | 163K |
| 代理商： | IRU3046CF |
4
Rev. 1.9
09/27/02
IRU3046
www.irf.com
PIN# PIN SYMBOL
10,15
HDrv2, HDrv1
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
μ
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.
11,14
12
13
17
18
19
20
22
23
24
LDrv2, LDrv1
PGnd
V
CL
VccLDO
V
OUT3
Fb3
SS
V
SEN33
PGood
Gnd
Figure 2 - Block diagram of the IRU3046.
Bias
Generator
LDrv2
Two Phase
Oscillator
1.25V
3V
Ramp1
Fb3
Sync
0.5V
POR
POR
Gnd
HDrv2
VcH2
VccLDO
SS
Comp2
1.25V
Error Amp2
PWM Comp2
POR
V
OUT3
25uA
25K
25K
Reset Dom
LDrv1
V
CL
HDrv1
VcH1
Fb1
Comp1
Error Amp1
PWM Comp1
25K
25K
Reset Dom
Set1
Set2
Ramp2
64uA Max
UVLO
4.2V / 4.0V
VcH2
3.5V / 3.3V
VcH1
3.5V / 3.3V
Vsen33
2.5V / 2.3V
4.2V / 4.0V
Fb2
25K
25K
40mA LDO Controller
PGnd
VccLDO
Vcc
Rt
1.25V
1.25V
V
SEN33
4
20
21
5
3
6
19
24
18
17
12
11
10
14
15
16
SS>2V
Vp2
V
REF
PGood
Fb3
Fb2
Fb1
PGood
Fb2 Monitor Shut Down
10K
R
S
Q
22
7
8
1
2
13
9
23
Q
S
R
2V
SS
BLOCK DIAGRAM
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相關(guān)代理商/技術(shù)參數(shù) |
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| IRU3046CFTR | 功能描述:IC REG CTRLR BUCK PWM VM 24TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:75 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.3 V ~ 13.5 V 降壓:是 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:0°C ~ 70°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:管件 產(chǎn)品目錄頁面:1051 (CN2011-ZH PDF) 其它名稱:296-2543-5 |
| 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 制造商全稱:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3047CW | 制造商:IRF 制造商全稱: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 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
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