PT5501C

更新时间： 2024-02-08 00:03:46

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
9页	174K
描述
3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator

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PT5501C 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	MODULE
包装说明：	, SIP5	针数：	5
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.72
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	VOLTAGE-MODE
最大输入电压：	5.5 V	最小输入电压：	4.5 V
标称输入电压：	5 V	JESD-30 代码：	R-XSMA-T5
功能数量：	1	端子数量：	5
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	5 A	封装主体材料：	UNSPECIFIED
封装等效代码：	SIP5	封装形状：	RECTANGULAR
封装形式：	MICROELECTRONIC ASSEMBLY	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	子类别：	Switching Regulator or Controllers
表面贴装：	NO	切换器配置：	BUCK
最大切换频率：	350 kHz	技术：	HYBRID
温度等级：	INDUSTRIAL	端子形式：	THROUGH-HOLE
端子位置：	SINGLE	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

PT5501C 数据手册

Application Notes

PT5500/5520 Series

Using the Inhibit Control on the PT5500/PT5520

Series of Excalibur Step-Down ISRs

For applications requiring output voltage On/Off control,

both the PT5500 and PT5520 series of power modules

incorporate an inhibit function. This function can be used

for power-up sequencing or wherever there is a require-

ment for the module to be switched off. The On/Off

function is provided by the Inhibit (pin 1) control.

Turn-On Time: In the circuit of Figure 1, turning Q₁on applies

a low-voltage to the Inhibit control (pin 1) and disables the

regulator output. Correspondingly, turning Q₁off allows the

Inhibit control pin to be pulled high by its internal pull-up

resistor. The ISR produces a fully regulated output voltage

within 10-msec of the release of the Inhibit control pin. The

actual turn-on time will vary with input voltage, output

load, and the total amount of load capacitance. Figure 2

shows the typical rise in both output voltage and input

current for a PT5502 (2.5V) following the turn-off of Q₁at

time t =0. The waveform was measured with a 5Vdc input

voltage, and 2.5A resistive load.

The ISR functions normally with Pin 1 open-circuit,

providing a regulated output whenever a valid source

voltage is applied to V_in, (pin 2). When a low-level

ground signal is applied to pin 1, the regulator output

will be disabled.

Figure 1 shows an application schematic, which details

the typical use of the Inhibit function. Note the discrete

transistor (Q1). The Inhibit control has its own internal

pull-up to +V_inpotential. An open-collector or open-

drain device is required to control this pin.

Figure 2

V_o(1V / Div)

The Inhibit pin control thresholds are given in Table 1.

Equation 1 may be used to determine the approximate

current drawn from the input source, and by Q₁when the

regulator is in the inhibit state.

I_IN(1A / Div)

V_INH(5V / Div)

Table 1; Inhibit Control Requirements

Parameter

Enable (V

Min

– 0.5

Max

)

Open

–0.2V+0.5V

-1

Disable (V

)

t (milli-secs)

Equation 1

Notes:

I_inh

= V_in÷ 10kΩ

20%

1. Use an open-collector device (preferably a discrete

transistor) for the Inhibit input. A pull-up resistor is not

necessary. To disable the output voltage, the control pin

should be pulled low to less than +0.5VDC.

2. Do not control the Inhibit input with an external DC

voltage. This will lead to erratic operation of the ISR and

may over-stress the regulator.

Figure 1

5. Avoid capacitance greater than 500pF at the Inhibit

control pin. Excessive capacitance at this pin will cause

the ISR to produce a pulse on the output voltage bus at

turn-on.

+V_IN

+V_O

Vin PT5502

INH G N D

V o

C1,

(Optional)

1µF

6. Keep the On/Off transition to less than 10µs. This

prevents erratic operation of the ISR, which could cause a

momentary high output voltage.

100µF

BSS138

Inhibit

COM

For technical support and more information, see inside back cover or visit www.ti.com

1...3 4 567 8 9

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与PT5501C相关器件

型号	品牌	描述	获取价格	数据表
PT5501N	TI	3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator	获取价格
PT5502	TI	3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator	获取价格
PT-5502	ETC	TRANSISTOR \| BJT \| NPN \| 80V V(BR)CEO \| 50A I(C) \| TO-210AE	获取价格
PT5502A	TI	3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator	获取价格
PT5502C	TI	3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator	获取价格
PT5502N	TI	3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator	获取价格

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