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参数资料
| 型号： | IRU3038CF |
| 厂商： | International Rectifier |
| 文件页数： | 3/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM TSSOP14 |
| 标准包装： | 94 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 440kHz |
| 占空比： | 95% |
| 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： | 14-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 1384 (CN2011-ZH PDF) |
| 其它名称： | *IRU3038CF |
IRU3038
PARAMETER
SYM
TEST CONDITION
MIN
TYP
MAX
UNITS
Error Amp
Fb Voltage Input Bias Current
Fb Voltage Input Bias Current
V P Voltage Range
I FB1
I FB2
SS=3V, Fb=1V
SS=0V, Fb=1V
0.8
-0.1
-64
1.5
m A
m A
V
Transconductance
g m
450
600
750
m mho
Oscillator
Frequency
Freq
Rt=Open
180
200
220
KHz
Rt=Gnd
360
400
440
Ramp Amplitude
V RAMP
1.225
1.25
1.275
V
Output Drivers
Rise Time
Fall Time
Dead Band Time
T r
T f
T DB
C LOAD =1500pF
C LOAD =1500pF
50
50
50
150
100
100
250
ns
ns
ns
Max Duty Cycle
Min Duty Cycle
T ON
T OFF
Fb=1V, Freq=200KHz
Fb=1.5V
85
0
90
0
95
%
%
PIN DESCRIPTIONS
PIN#
PIN SYMBOL PIN DESCRIPTION
1
2
3
4
5
14
6
7
8
9
10
11
12
13
Fb
V P
V REF
Vcc
NC
LDrv
Gnd
PGnd
HDrv
Vc
Rt
Comp
SS
This pin is connected directly to the output of the switching regulator via resistor divider to
provide feedback to the Error amplifier.
Non-inverting input of error amplifier.
Reference Voltage.
This pin provides biasing for the internal blocks of the IC as well as power for the low side
driver. A minimum of 1 m F, high frequency capacitor must be connected from this pin to
ground to provide peak drive current capability.
No Connection.
Output driver for the synchronous power MOSFET.
Analog ground for internal reference and control circuitry. Connect to PGnd with a short
trace.
This pin serves as the separate ground for MOSFET's drivers and should be connected to
system's ground plane. A high frequency capacitor (0.1 to 1 m F) must be connected from
Vcc and Vc pins to this pin for noise free operation.
Output driver for the high side power MOSFET. Connect a diode, such as BAT54 or 1N4148,
from this pin 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.
This pin is connected to a voltage that must be at least 4V higher than the bus voltage of
the switcher (assuming 5V threshold MOSFET) and powers the high side output driver. A
minimum of 1 m F, high frequency capacitor must be connected from this pin to ground to
provide peak drive current capability.
The switching frequency can be Programmed between 200KHz and 400KHz by connect-
ing a resistor between Rt and Gnd. Floating the pin set the switching frequency to 200KHz
and grounding the pin set the switching frequency to 400KHz.
Compensation pin of the error amplifier. An external resistor and capacitor network is
typically connected from this pin to ground to provide loop compensation.
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.
Rev. 2.0
09/12/02
www.irf.com
3
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相关代理商/技术参数 |
参数描述 |
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| IRU3038CFTRPBF | 制造商:International Rectifier 功能描述:Voltage Mode PWM Controller 500mA 14-Pin TSSOP T/R |
| IRU3038CS | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| IRU3038CSTR | 功能描述:IC REG CTRLR BUCK PWM VM 14-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 |
| IRU3039 | 制造商:IRF 制造商全称:International Rectifier 功能描述:SYNCHRONOUS PWM CONTROLLER WITH OVER CURRENT PROTECTION |
| IRU3039CH | 制造商:IRF 制造商全称:International Rectifier 功能描述:SYNCHRONOUS PWM CONTROLLER WITH OVER CURRENT PROTECTION |
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