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| 型号： | ADP2109ACBZ-1.8-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.8V .6A 5WLCSP |
| 产品变化通告： | 8mm Carrier Tape Changes 28/Feb/2012 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.8V |
| 输入电压： | 2.3 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 3MHz |
| 电流 - 输出： | 600mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 5-WFBGA，WLCSP |
| 包装： | 标准包装 |
| 供应商设备封装： | 5-WLCSP |
| 产品目录页面： | 791 (CN2011-ZH PDF) |
| 配用： | ADP2109CB-1.8EVALZ-ND - BOARD EVAL FOR 1.8V ADP2109 |
| 其它名称： | ADP2109ACBZ-1.8-R7DKR |
V OUT × ( V IN ? V OUT )
V IN × f SW × L
ADP2109
APPLICATIONS INFORMATION
ADISIMPOWER DESIGN TOOL
The ADP2109 is supported by ADIsimPower design tool set.
ADIsimPower is a collection of tools that produce complete power
designs optimized for a specific design goal. The tools enable
the user to generate a full schematic, bill of materials, and calculate
performance in minutes. ADIsimPower can optimize designs for
cost, area, efficiency, and parts count while taking into consideration
the operating conditions and limitations of the IC and all real
external components. For more information about ADIsimPower
design tools, refer to www.analog.com/ADIsimPower . The tool
set is available from this website, and users can also request an
unpopulated board through the tool.
EXTERNAL COMPONENT SELECTION
Parameters like efficiency and transient response can be
affected by varying the choice of external components in
Inductor
The high switching frequency of the ADP2109 allows for the
selection of small chip inductors. For best performance, use
inductor values between 0.7 μH and 3 μH. Recommended
The peak-to-peak inductor current ripple is calculated using
the following equation:
I RIPPLE =
where:
f SW is the switching frequency.
L is the inductor value.
The minimum dc current rating of the inductor must be greater
than the inductor peak current. The inductor peak current is
calculated using the following equation:
Data Sheet
Output Capacitor
Higher output capacitor values reduce the output voltage ripple
and improve load transient response. When choosing this value,
it is also important to account for the loss of capacitance due to
output voltage dc bias.
Ceramic capacitors are manufactured with a variety of dielectrics,
each with a different behavior over temperature and applied
voltage. Capacitors must have a dielectric that is adequate to
ensure the minimum capacitance over the necessary temper-
ature range and dc bias conditions. X5R or X7R dielectrics
with a voltage rating of 6.3 V or 10 V are recommended for
best performance. Y5V and Z5U dielectrics are not recom-
mended for use with any dc-to-dc converter because of their
poor temperature and dc bias characteristics.
The worst-case capacitance accounting for capacitor variation
over temperature, component tolerance, and voltage is
calculated using the following equation:
C EFF = C OUT × (1 – TEMPCO ) × 1(1 – TOL )
where:
C EFF is the effective capacitance at the operating voltage.
TEMPCO is the worst-case capacitor temperature coefficient.
TOL is the worst-case component tolerance.
In this example, the worst-case temperature coefficient (TEMPCO)
over ?40°C to +85°C is assumed to be 15% for an X5R dielectric.
The tolerance of the capacitor (TOL) is assumed to be 10%, and
Substituting these values in the equation yields
C EFF = 9.2481 μF × (1 – 0.15) × (1 – 0.1) = 7.0747 μF
To guarantee the performance of the ADP2109, it is imperative
that the effects of dc bias, temperature, and tolerances on the
behavior of the capacitors be evaluated for each application.
I PEAK = I LOAD ( MAX ) +
I RIPPLE
2
12
10
Inductor conduction losses are caused by the flow of current
through the inductor, which has an associated internal DCR.
Larger sized inductors have smaller DCR, which may decrease
inductor conduction losses. Inductor core losses are related to
the magnetic permeability of the core material. Because the
ADP2109 is a high switching frequency dc-to-dc converter,
shielded ferrite core material is recommended for its low core
losses and low EMI.
Table 6. S uggested 1.0 μ H Inductors
8
6
4
2
0
Vendor
Model
Dimensions
I SAT (mA)
DCR (mΩ)
0
1
2
3
4
5
6
Murata
Coilcraft
Toko
TDK
LQM2HPN1R0M
LPS3010-102
MDT2520-CN
CPL2512T
2.5 × 2.0 × 1.1
3.0 × 3.0 × 0.9
2.5 × 2.0 × 1.2
2.5 × 1.5 × 1.2
1500
1700
1800
1500
90
85
100
100
DC BIAS VOLTAGE (V)
Figure 28. Typical Capacitor Performance
Rev. B | Page 12 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP2109CB-1.8EVALZ | 功能描述:BOARD EVAL FOR 1.8V ADP2109 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 |
| ADP2109CB-1.8EVALZ | 制造商:Analog Devices 功能描述:ADP2109, DC TO DC CONV, STEP DOWN, EVAL |
| ADP2114 | 制造商:AD 制造商全称:Analog Devices 功能描述:Configurable, Dual 2 A/Single 4 A, Synchronous Step-Down DC-to-DC Regulator |
| ADP2114-2PH-EVALZ | 功能描述:BOARD EVALUATION 1.2V 4A 1.2MHZ 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 |
| ADP2114ACPZ-R2 | 功能描述:直流/直流开关调节器 Dual-Step Down Converter w/ 2A x 2output RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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