Datasheet > ADM1051AJR-REEL

ADM1051AJR-REEL

更新时间： 2024-01-20 09:36:31

品牌	Logo	应用领域
亚德诺 - ADI		开关光电二极管
页数	文件大小	规格书
10页	173K
描述
IC DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8, Switching Regulator or Controller

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技术参数
数据手册

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ADM1051AJR-REEL 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	End Of Life	零件包装代码：	SOIC
包装说明：	SOIC-8	针数：	8
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.15
模拟集成电路 - 其他类型：	DUAL SWITCHING CONTROLLER	最大输入电压：	12.72 V
最小输入电压：	11.28 V	标称输入电压：	12 V
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e0
长度：	4.9 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	8
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	240	认证状态：	Not Qualified
座面最大高度：	2.59 mm	表面贴装：	YES
切换器配置：	SINGLE	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn85Pb15)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	宽度：	3.9 mm
Base Number Matches：	1

ADM1051AJR-REEL 数据手册

ADM1051/ADM1051A

PC 5V SUPPLY

For compatibility with the TYPEDET signal, the regulator output

voltage of Channel 1 may be selected using the Shutdown pin.

This is a multilevel, dual-function input that allows selection of

the regulator output voltage as well as shutdown of the regulator.

3k⍀

SHDN1

3k⍀

TYPEDET

By setting SHDN1 to different voltages, the regulator can be put

into four different operating modes.

Figure 2. Using SHDN1 with TYPEDET Signal

A shutdown function can be added by connecting an open-drain/

open-collector logic output to SHDN1, or by using a totem-pole

logic output with a Schottky diode, as shown in Figure 3.

Table I. Shutdown Functionality for 1.5 V Channel

SHDN1 Voltage

Mode Function

< 0.8 V

Force Output Low, Regulator

PC 5V SUPPLY

Shutdown

1.5 V Output

COMPLEMENTARY

OR TOTEM-POLE

OUTPUT

3k⍀

SHDN1

2 V–3.9 V

4.3 V–5.3 V

>6.2 V or Floating

ADM1051/

ADM1051A

Force Output High, V_OUT= 3.3 V

1.5 V Output

SCHOTTKY

DIODE

3k⍀

TYPEDET

If the SHDN1 pin is connected to a voltage less than 0.8 V, the

FORCE output will go low and the regulator will be shut down.

PC 5V SUPPLY

OPEN-DRAIN OR

OPEN-COLLECTOR

OUTPUT

3k⍀

If the SHDN1 pin is connected to a voltage greater than 6.2 V,

or simply left open-circuit, the regulator will operate normally

and provide 1.5 V out. This allows the regulator to operate

normally with no external connection to SHDN1.

SHDN1

ADM1051/

ADM1051A

3k⍀

TYPEDET

If the SHDN1 pin is connected to a voltage between 2 V and 3.9 V,

the regulator will also operate normally and provide 1.5 V out.

Figure 3. TYPEDET Voltage Selection Combined with

Shutdown Function

If the SHDN1 pin is connected to a voltage between 4.3 V and

5.3 V, the FORCE output will be high and the external MOSFET

will be turned hard on, making the output voltage equal to the 3.3 V

input (less any small drop due to the on-resistance of the MOSFET).

In this mode it is not actually regulating, but simply acting as a

switch for the 3.3 V supply. The voltage drop across the Channel 1

MOSFET in Mode 3 can be minimized by using a MOSFET

with very low on resistance, for which Channel 1 is optimized,

such as the PHD55N03LT.

When the logic output is high or turned off, the regulator mode

will be controlled by TYPEDET. When the logic output is low,

the regulator will be shut down.

Table II. TYPEDET and Shutdown Truth Table

TYPEDET

Regulator Mode

Shutdown

1.5 V

3.3 V

The latter two modes allow the regulator to be controlled by the

TYPEDET signal simply by using potential divider, as shown in

Figure 2.

X = Don’t care.

Note that when Channel 1 of the ADM1051 is set to 3.3 V,

Channel 2 should not be shut down while Channel 1 is active.

POR THRESHOLD

4V – 7V

TURN-ON

THRESHOLD

REF

12V SUPPLY

3.3V SUPPLY

TO EXTERNAL

MOSFET DRAIN

MOSFET GATE

THRESHOLD

GATE DRIVE TO

EXTERNAL

MOSFET

FAULT

REMOVED

NORMAL

OUTPUT VOLTAGE

OUTPUT < 0.8

REG

CHANNEL 1

OR CHANNEL 2

OUTPUT VOLTAGE

DEVICE ENTERS HICCUP MODE

FAULT CURRENT

HICCUP MODE

HOLD-OFF TIME

2 AMPS

CHANNEL 1

OR CHANNEL 2

OUTPUT CURRENT

OFF

1:40 DUTY CYCLE

Figure 4. Power-On Reset and Hiccup Mode

–7–

REV. 0

1...4 5 678 9 10

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