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ADP1111ARZ-5

更新时间： 2024-01-01 21:45:22
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER 开关光电二极管
页数 文件大小 规格书
16页 1044K
描述
1.5 A SWITCHING REGULATOR, 88 kHz SWITCHING FREQ-MAX, PDSO8, SOIC-8

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ADP1111ARZ-5 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP,针数：8
Reach Compliance Code：unknown风险等级：5.17
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
控制技术：PULSE FREQUENCY MODULATION最大输入电压：30 V
最小输入电压：2 V标称输入电压：3 V
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
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：
最大输出电流：1.5 A标称输出电压：5 V
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）：260座面最大高度：1.75 mm
表面贴装：YES切换器配置：BUCK-BOOST
最大切换频率：88 kHz温度等级：COMMERCIAL
端子面层：MATTE TIN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：40宽度：3.9 mm
Base Number Matches：1

ADP1111ARZ-5 数据手册

 浏览型号ADP1111ARZ-5的Datasheet PDF文件第9页浏览型号ADP1111ARZ-5的Datasheet PDF文件第10页浏览型号ADP1111ARZ-5的Datasheet PDF文件第11页浏览型号ADP1111ARZ-5的Datasheet PDF文件第13页浏览型号ADP1111ARZ-5的Datasheet PDF文件第14页浏览型号ADP1111ARZ-5的Datasheet PDF文件第15页 
ADP1111  
Table I. Component Selection for Typical Converters  
Input  
Voltage  
Output  
Voltage  
Output  
Current (mA)  
Circuit  
Figure  
Inductor  
Value  
Inductor  
Part No.  
Capacitor  
Value  
Notes  
2 to 3.1  
2 to 3.1  
2 to 3.1  
2 to 3.1  
5
5
5
90 mA  
10 mA  
30 mA  
10 mA  
90 MA  
30 mA  
50 mA  
300 mA  
300 mA  
7 mA  
4
4
4
4
4
4
5
5
5
6
6
15 μH  
47 μH  
15 μH  
47 μH  
33 μH  
47 μH  
15 μH  
56 μH  
120 μH  
56 μH  
120 μH  
CD75-150K  
CTX50-1  
CD75-150K  
CTX50-1  
CD75-330K  
CTX50-1  
33 μF  
10 μF  
22 μF  
10 μF  
22 μF  
15 μF  
47 μF  
47 μF  
47 μF  
47 μF  
100 μF  
*
12  
12  
12  
12  
5
5
5
–5  
–5  
5
6.5 to 11  
12 to 20  
20 to 30  
5
**  
**  
**  
CTX50-4  
CTX100-4  
CTX50-4  
CTX100-4  
12  
250 mA  
**  
NOTES  
CD = Sumida.  
CTX = Coiltronics.  
**Add 47 Ω from ILIM to VIN  
.
**Add 220 Ω from ILIM to VIN  
.
also reduces the circuit’s output voltage sensitivity to tempera-  
ture, which otherwise would be dominated by the –2 mV VBE  
contribution of Q1. The output voltage for this circuit is  
determined by the formula:  
POSITIVE-TO-NEGATIVE CONVERSION  
The ADP1111 can convert a positive input voltage to a negative  
output voltage as shown in Figure 22. This circuit is essentially  
identical to the step-down application of Figure 19, except that  
the “output” side of the inductor is connected to power ground.  
When the ADP1111’s internal power switch turns off, current  
flowing in the inductor forces the output (–VOUT) to a negative  
potential. The ADP1111 will continue to turn the switch on  
until its FB pin is 1.25 V above its GND pin, so the output  
voltage is determined by the formula:  
R2  
VOUT = 1. 25 V •  
R1  
Unlike the positive step-up converter, the negative-to-positive  
converter’s output voltage can be either higher or lower than the  
input voltage.  
D1  
1N5818  
⎛
⎝
R2⎞  
L1  
VOUT = 1. 25 V • 1+  
⎜
⎟
POSITIVE  
OUTPUT  
R1  
⎠
R2  
+
R
LIM  
C
L
D2  
Q1  
MJE210  
2N3906  
INPUT  
2
1
+
+
C2  
I
V
IN  
R
LIM  
LIM  
3
8
SW1  
FB  
C
INPUT  
ADP1111  
2
3
1
10kΩ  
L1  
OUTPUT  
I
V
IN  
SW1  
LIM  
AO SET GND SW2  
4
8
SW2  
6
7
5
4
R1  
ADP1111  
R2  
R1  
FB  
AO SET GND  
NC NC  
NEGATIVE  
INPUT  
+
6
7
5
D1  
1N5818  
C
L
NC NC  
NEGATIVE  
OUTPUT  
Figure 23. ADP1111 Negative-to-Positive Converter  
LIMITING THE SWITCH CURRENT  
Figure 22. Positive-to-Negative Converter  
The ADP1111’s RLIM pin permits the switch current to be  
limited with a single resistor. This current limiting action occurs  
on a pulse by pulse basis. This feature allows the input voltage  
to vary over a wide range without saturating the inductor or  
exceeding the maximum switch rating. For example, a particular  
design may require peak switch current of 800 mA with a 2.0 V  
input. If VIN rises to 4 V, however, the switch current will  
exceed 1.6 A. The ADP1111 limits switch current to 1.5 A and  
thereby protects the switch, but the output ripple will increase.  
Selecting the proper resistor will limit the switch current to  
800 mA, even if VIN increases. The relationship between RLIM  
and maximum switch current is shown in Figure 6.  
The design criteria for the step-down application also apply to  
the positive-to-negative converter. The output voltage should be  
limited to |6.2 V| unless a diode is inserted in series with the  
SW2 pin (see Figure 20.) Also, D1 must again be a Schottky  
diode to prevent excessive power dissipation in the ADP1111.  
NEGATIVE-TO-POSITIVE CONVERSION  
The circuit of Figure 23 converts a negative input voltage to a  
positive output voltage. Operation of this circuit configuration is  
similar to the step-up topology of Figure 18, except the current  
through feedback resistor R2 is level-shifted below ground by a  
PNP transistor. The voltage across R2 is VOUT –VBEQ1. How-  
ever, diode D2 level-shifts the base of Q1 about 0.6 V below  
ground thereby cancelling the VBE of Q1. The addition of D2  
The ILIM feature is also valuable for controlling inductor current  
when the ADP1111 goes into continuous-conduction mode.  
REV.  
A
–11–  
1...910111213141516

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