- 您现在的位置：买卖IC网 > PDF目录4970 > ADP1873ARMZ-0.6-R7 (Analog Devices Inc)IC REG CTRLR BUCK PWM CM 10-MSOP PDF资料下载
参数资料
| 型号： | ADP1873ARMZ-0.6-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 23/40页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 10-MSOP |
| 标准包装： | 1 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 占空比： | 65% |
| 电源电压： | 2.75 V ~ 20 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： | -40°C ~ 125°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 标准包装 |
| 产品目录页面： | 792 (CN2011-ZH PDF) |
| 其它名称： | ADP1873ARMZ-0.6-R7DKR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页当前第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
Data Sheet
APPLICATIONS INFORMATION
FEEDBACK RESISTOR DIVIDER
ADP1872/ADP1873
Table 7. Recommended Inductors
The required resistor divider network can be determine for a
given V OUT value because the internal band gap reference (V REF )
is fixed at 0.6 V. Selecting values for R T and R B determines the
minimum output load current of the converter. Therefore, for a
given value of R B , the R T value can be determined by
L
(μH)
0.12
0.22
0.47
0.72
DCR
(mΩ)
0.33
0.33
0.8
1.65
I SAT
(A)
55
30
50
35
Dimensions
(mm)
10.2 × 7
10.2 × 7
14.2 × 12.8
10.5 × 10.2
Manufacturer
Würth Elektronic
Würth Elektronic
Würth Elektronic
Würth Elektronic
Model No.
744303012
744303022
744355147
744325072
R T = R B ×
( V OUT ? 0 . 6 V)
0 . 6 V
0.9
1.2
1.0
1.6
1.8
3.3
28
25
20
13 × 12.8
10.5 × 10.2
10.5 × 10.2
Würth Elektronic
Würth Elektronic
Würth Elektronic
744355090
744325120
7443552100
INDUCTOR SELECTION
The inductor value is inversely proportional to the inductor
1.4
2.0
0.8
3.2
2.6
24
22
27.5
14 × 12.8
13.2 × 12.8
Würth Elektronic
Würth Elektronic
Sumida
744318180
7443551200
CEP125U-0R8
ripple current. The peak-to-peak ripple current is given by
? I L = K I × I LOAD ≈
I LOAD
3
OUTPUT RIPPLE VOLTAGE (ΔV RR )
The output ripple voltage is the ac component of the dc output
( VIN ? V OUT ) V OUT
? I L × f SW
where K I is typically 0.33.
The equation for the inductor value is given by
L = ×
VIN
where:
VIN is the high voltage input.
V OUT is the desired output voltage.
f SW is the controller switching frequency (300 kHz, 600 kHz,
and 1.0 MHz).
When selecting the inductor, choose an inductor saturation rating
that is above the peak current level and then calculate the
voltage during steady state. For a ripple error of 1.0%, the output
capacitor value needed to achieve this tolerance can be determined
using the following equation. (Note that an accuracy of 1.0% is
only possible during steady state conditions, not during load
transients.)
Δ V RR = (0.01) × V OUT
OUTPUT CAPACITOR SELECTION
The primary objective of the output capacitor is to facilitate
the reduction of the output voltage ripple; however, the output
capacitor also assists in the output voltage recovery during load
transient events. For a given load current step, the output voltage
ripple generated during this step event is inversely proportional
to the value chosen for the output capacitor. The speed at which
the output voltage settles during this recovery period depends
52
50
48
46
44
42
40
38
36
34
32
30
28
26
ΔI = 50%
ΔI = 40%
ΔI = 33%
on where the crossover frequency (loop bandwidth) is set. This
crossover frequency is determined by the output capacitor, the
equivalent series resistance (ESR) of the capacitor, and the
compensation network.
To calculate the small signal voltage ripple (output ripple
voltage) at the steady state operating point, use the following
equation:
C OUT = ? I L × ? ?
1
?
24
22
20
18
16
?
?
?
8 × f SW × [ ? V RIPPLE ? ( ? I L × ESR ) ] ? ?
14
12
10
8
6
8
10
12
14
16
18
20
22
24
26
28
30
where ESR is the equivalent series resistance of the output
capacitors.
VALLEY CURRENT LIMIT (A)
To calculate the output load step, use the following equation:
Figure 78. Peak Current vs. Valley Current Threshold for
33%, 40%, and 50% of Inductor Ripple Current
C OUT = 2 ×
f SW
? I LOAD
× ( ? V DROOP ? ( ? I LOAD × ESR ))
where Δ V DROOP is the amount that V OUT is allowed to deviate for
a given positive load current step (ΔI LOAD ).
Rev. B | Page 23 of 40
相关PDF资料 |
PDF描述 |
|---|---|
| ABC06DRAS | CONN EDGECARD 12POS .100 R/A DIP |
| RBE15DHRN | CONN EDGE DUAL 1MM EXTEND 30 POS |
| RBM10DTMN-S273 | CONN EDGECARD 20POS R/A .156 SLD |
| 2474-31L | INDUCTOR 330UH POWER AXIAL |
| 2474-33L | INDUCTOR 470UH POWER AXIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1873ARMZ-1.0-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| ADP1873-BL1-EVZ | 功能描述:EVAL BOARD FOR ADP1873 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ADP1873-BL2-EVZ | 功能描述:EVAL BOARD FOR ADP1873 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| ADP1874 | 制造商:AD 制造商全称:Analog Devices 功能描述:Synchronous Buck Controller with Constant On-Time and Valley Current Mode |
| ADP1874-0.3-EVALZ | 功能描述:BOARD EVAL FOR ADP1874 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
发布紧急采购，3分钟左右您将得到回复。