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參數資料
| 型號： | IRU3048 |
| 廠商： | International Rectifier |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER |
| 中文描述： | 雙同步PWM控制器電路和LDO控制器 |
| 文件頁數： | 3/18頁 |
| 文件大?。?/td> | 154K |
| 代理商： | IRU3048 |
IRU3048
3
Rev. 1.7
09/12/02
www.irf.com
PARAMETER
Error Amp
Fb Voltage Input Bias Current
Fb Voltage Input Bias Current
Transconductance 1
Transconductance 2
Oscillator
Frequency
Ramp Amplitude
Output Drivers
Rise Time
Fall Time
Dead Band Time
Max Duty Cycle
Min Duty Cycle
LDO Controller
Drive Current
Fb Voltage
Input Bias Current
SYM TEST CONDITION
MIN TYP MAX UNITS
PIN DESCRIPTIONS
PIN# PIN SYMBOL
1
2
16
Fb1
PIN DESCRIPTION
Ground pin.
Inverting inputs to the error amplifiers. These pins work as feedback inputs for each
channel, and are connected directly to the output of the switching regulator via a resistor
divider to set the output voltages.
SS=3V
SS=0V
C
L
=1500pF
C
L
=1500pF
Fb=1V, Freq=200KHz
Fb=1.5V
180
50
85
0
30
1.225
-0.1
-64
400
600
200
1.25
35
50
150
90
0
45
1.25
0.5
220
100
100
250
1.275
2
μ
A
μ
A
μ
mho
μ
mho
KHz
V
PP
ns
ns
ns
%
%
mA
V
μ
A
3
4
5
12
6
11
7
10
8
9
13
14
15
Gnd
Fb2
Comp1
Comp2
VcH2
VcH1
HDrv2
HDrv1
LDrv2
LDrv1
PGnd
Vcc
V
OUT3
Fb3
SS
Compensation pins for the error amplifiers.
Supply voltage for the high side output drivers. These are connected to voltages that
must be at least 4V higher than their bus voltages (assuming 5V threshold MOSFET). A
minimum of 1
μ
F high frequency capacitor must be connected from these pins to PGnd
pin to provide peak drive current capability.
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.
Supply voltage for the internal blocks of the IC.
Driver signal for the LDO’s external transistor.
LDO’s feedback pin, connected to a resistor divider to set the output voltage of LDO.
Soft-Start pin. The converter can be shutdown by pulling this pin below 0.5V.
I
FB1
I
FB2
g
m1
g
m2
Freq
V
RAMP
Tr
Tf
T
DB
T
ON
T
OFF
I
LDO
V
FB
LDO
I
LDO(BIAS)
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| IRU3048CF | DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| IRU3048CF | 制造商:IRF 制造商全稱:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER |
| IRU3048CFTR | 功能描述:IC REG CTRLR BUCK PWM VM 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:75 系列:- PWM 型:電流模式 輸出數: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 產品目錄頁面:1051 (CN2011-ZH PDF) 其它名稱:296-2543-5 |
| IRU3048CS | 制造商:IRF 制造商全稱:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER |
| IRU3048CSTR | 功能描述:IC REG CTRLR BUCK PWM VM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:75 系列:- PWM 型:電流模式 輸出數: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 產品目錄頁面:1051 (CN2011-ZH PDF) 其它名稱:296-2543-5 |
| IRU3048CSTRPBF | 制造商:International Rectifier 功能描述:Dual Synchronous PWM Controller Circuitry and LDO Controller 16-Pin SOIC N T/R |
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