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参数资料
| 型号： | MAX15066EWE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/21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
FEEDBACK
DIVIDER
V OUT
ERROR AMPLIFIER
POWER MODULATOR
COMPENSATION
V IN
RAMP
OUTPUT FILTER
AND LOAD
R1
*C FF
FB
C
g MC
V FB
COMP
Q HS
I L
V OUT
V COMP
CONTROL
LOGIC
L
DCR
I OUT
R2
g MV
R OUT
R C
PWM
COMPARATOR
Q LS
ESR
R LOAD
C OUT
C C
V COMP
G MOD
V OUT
I L
REF
R OUT =
10
AVEA(dB)/20
g MV
NOTE: THE G MOD STAGE SHOWN ABOVE MODELS THE AVERAGE CURRENT OF THE INDUCTOR, I L ,
INJECTED INTO THE OUTPUT LOAD, I OUT , e.g., I L = I OUT .
SUCH CAN BE USED TO SIMPLIFY/MODEL THE MODULATION/CONTROL/POWER STAGE
CIRCUITRY SHOWN WITHIN THE BOXED AREA.
*C FF IS OPTIONAL, DESIGNED TO EXTEND THE REGULATOR’S
GAIN BANDWIDTH AND INCREASED PHASE MARGIN FOR SOME
LOW-DUTY CYCLE APPLICATIONS.
Figure 3. Peak Current-Mode Regulator Transfer Model
V OUT R LOAD × I L
V COMP
I L
? ? ? ?
G MOD ( DC )
= g MC ×
R LOAD
? 1 + × ? ? K S × ( 1 ? D ) ? 0.5 ? ? ?
1 + SLOPE SLOPE SW MC
K S = =
1 +
V SLOPE
S = = V SLOPE × f SW
t SW
The average current through the inductor is expressed as:
I L
= G MOD × V COMP
where I L is the average inductor current and G MOD is
the power modulator’s transconductance. For a buck
converter:
V OUT
= R LOAD × I L
where R LOAD is the equivalent load resistor value.
Combining the above two relationships, the power mod-
ulator’s transfer function in terms of V OUT with respect
to V COMP is:
= = R LOAD × G MOD
? ?
? G MOD ?
The peak current-mode controller’s modulator gain is
attenuated by the equivalent divider ratio of the load
resistance and the current-loop gain. G MOD becomes:
1
? ?
? f SW × L ?
where R LOAD = V OUT /I OUT(MAX) , f SW is the switching
frequency, L is the output inductance, D is the duty cycle
(V OUT /V IN) , and K S is the slope compensation factor
calculated from the following equation:
S V × f × L × g
S N ( V IN ? V OUT )
where:
SLOPE
16
S N =
( V IN ? V OUT )
L × g MC
Maxim Integrated
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