- 您现在的位置：买卖IC网 > PDF目录1836 > MAX15066EWE+T (Maxim Integrated Products)IC REG BUCK SYNC ADJ 4A 16WLP PDF资料下载
参数资料
| 型号： | MAX15066EWE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 16WLP |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.606 V ~ 14.4 V |
| 输入电压： | 4.5 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 4A |
| 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： | 16-UFBGA，WLCSP |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-WLP（2x2） |
MAX15066/MAX15166
High-Efficiency, 4A, Step-Down DC-DC
Regulators with Internal Power Switches
? I P ? P
V RIPPLE(C) =
C OUT =
Output-Capacitor Selection
The key selection parameters for the output capacitor
are capacitance, ESR, ESL, and voltage-rating require-
ments. These affect the overall stability, output ripple
voltage, and transient response of the DC-DC converter.
The output ripple occurs due to variations in the charge
stored in the output capacitor, the voltage drop due to
the capacitor’s ESR, and the voltage drop due to the
capacitor’s ESL. Estimate the output-voltage ripple due
to the output capacitance, ESR, and ESL as follows:
V
V RIPPLE = RIPPLE(C) + V RIPPLE(ESR) + V RIPPLE(ESL)
where the output ripple due to output capacitance, ESR,
and ESL is:
? I P
8 × C OUT × f SW
V RIPPLE(ESR) = ? P × ESR
and V RIPPLE(ESL ) can be approximated as an inductive
divider from LX to GND:
Load-transient response also depends on the selected
output capacitance. During a load transient, the output
instantly changes by ESR x ?I LOAD . Before the controller
can respond, the output deviates further, depending on
the inductor and output capacitor values. After a short
time, the controller responds by regulating the output
voltage back to the predetermined value.
Use higher C OUT values for applications that require
light-load operation or transition between heavy load and
light load, triggering skip mode, causing output under-
shooting or overshooting. When applying the load, limit
the output undershooting by sizing C OUT according to
the following formula:
? I LOAD
3f CO × ? V OUT
where ?IL OAD is the total load change, f CO is the unity-
gain bandwidth (or zero-crossing frequency), and ?V OUT
is the desired output undershooting. When removing the
load and entering skip mode, the device cannot control
output overshooting, since it has no sink current capabil-
= V IN ×
V RIPPLE (ESL) = V LX ×
ESL ESL
L L
ity; see the Skip Mode Frequency and Output Ripple
section to properly size C OUT under this circumstance.
( V IN ? V OUT ) × ?
? V OUT ?
? V IN ?
? I P ? P =
( ) , voltage soar (overshoot)
C OUT (MIN) =
( V FIN SOAR )
+ V
? V INIT
where V LX swings from V IN to GND.
The peak-to-peak inductor current ( D I P-P ) is:
?
L × f SW
When using ceramic capacitors, which generally have
A worst-case analysis in sizing the minimum output
capacitance takes the total energy stored in the inductor
into account, as well as the allowable sag/soar (under-
shoot/overshoot) voltage as follows:
L × I 2 OUT ( MAX ) ? I 2 OUT ( MIN )
2 2
V INIT FIN SAG )
? ( V
? V
low-ESR, D V RIPPLE(C) dominates. When using electro-
lytic capacitors, D V RIPPLE(ESR) dominates. Use ceramic
capacitors for low ESR and low ESL at the switching fre-
quency of the converter. The ripple voltage due to ESL is
C OUT(MIN) =
L × ( I 2 OUT ( MAX ) ? I 2 OUT ( MIN )
2 2
) , voltage sag (undershoot)
negligible when using ceramic capacitors.
As a general rule, a smaller inductor ripple current
results in less output ripple voltage. Since inductor
ripple current depends on the inductor value and
input voltage, the output ripple voltage decreases with
larger inductance and increases with higher input volt-
ages. However, the inductor ripple current also impacts
transient-response performance, especially at low V IN to
V OUT differentials. Low inductor values allow the induc-
tor current to slew faster, replenishing charge removed
from the output filter capacitors by a sudden load step.
14
where I OUT(MAX) and I OUT(MIN) are the initial and final
values of the load current during the worst-case load
dump, V INIT is the initial voltage prior to the transient,
V FIN is the steady-state voltage after the transient,
V SOAR is the allowed voltage soar (overshoot) above
V FIN , and V SAG is the allowable voltage sag below V FIN .
The terms (V FIN + V SOAR ) and (V FIN - V SAG ) represent
the maximum/minimum transient output voltage reached
during the transient, respectively.
Use these equations for initial output-capacitor selection.
Determine final values by testing a prototype or an evalu-
ation circuit under the worst-case conditions.
Maxim Integrated
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1507ETA+T | IC BATT CHARGER LI-ION 8-TDFN |
| MAX1508ZETA+T | IC BATT CHARGER LI-ION 8-TDFN |
| MAX15101EWL+T | IC REG LDO ADJ 1A 15WLP |
| MAX15102EWL+T | IC REG LDO ADJ 2A 15WLP |
| MAX15103EWL+T | IC REG LDO ADJ 3A 15WLP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15068AEVKIT# | 功能描述:电源管理IC开发工具 EVKIT for Hot Swap oring & pwr monitor RoHS:否 制造商:Maxim Integrated 产品: 类型: 工具用于评估: 输入电压: 输出电压: |
| MAX15068ATP+ | 制造商:Maxim Integrated Products 功能描述:DUAL ORING, SINGLE HOT-SWAP CONTROLLER WITH ACCURATE POWER - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC HOT SWAP VOLT CTLR QFN |
| MAX15068ATP+G2Z | 制造商:Maxim Integrated Products 功能描述:DUAL ORING, SINGLE HOT-SWAP CONTROLLER WITH ACCURATE POWER - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC HOT SWAP VOLT CTLR QFN |
| MAX15068ATP+T | 制造商:Maxim Integrated Products 功能描述:DUAL ORING, SINGLE HOT-SWAP CONTROLLER WITH ACCURATE POWER - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC HOT SWAP VOLT CTLR QFN |
| MAX15068ATP+TG2Z | 制造商:Maxim Integrated Products 功能描述:IC HOT SWAP VOLT CTLR QFN |
发布紧急采购，3分钟左右您将得到回复。