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| 型号： | MAX8952BEWE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/31页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2.5A 16WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS 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： | 0.77 V ~ 1.4 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 频率 - 开关： | 3.25MHz |
| 电流 - 输出： | 2.5A |
| 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） |
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MAX8952
2.5A Step-Down Regulator
with Remote Sense in 2mm x 2mm WLP
Enable
The MAX8952 DC-DC step-down regulator is
enabled/disabled using the EN logic input. The EN
input is able to handle input voltages up to V IN1 , ensur-
ing that the EN logic input can be controlled by a wide
variety of signals/supplies.
The EN input has an internal pulldown resistor that
ensures EN is discharged during off conditions. This pull-
down resistor can be disabled through the CONTROL
register (see Table 7) once the IC is enabled, achieving
lowest possible quiescent current. When EN is low, the
CONTROL register is reset to default, enabling the pull-
down resistors on EN, VID0, and VID1. See Figures 2
and 3 for detailed information on power-up and power-
down sequencing and operation mode changes.
DC-DC Regulator Operating Modes
The IC operates in one of four modes determined by
the state of the VID_ inputs (see Table 1). At power-up,
the IC is set to operate in power-save operation for
MODE0 through MODE3. For each of the operation
modes, the DC-DC step-down regulator can be set to
operate in either power-save mode or forced-PWM
mode. This is done by writing to the MODE_ registers
(see Table 3 to Table 6). The mode of operation can be
changed at any time.
In power-save mode, the MAX8952 PWM switching fre-
quency depends on the load current. For medium to
high load condition, the IC operates in fixed-frequency
PWM mode. For light load conditions, the IC operates
in hysteretic mode. The proprietary hysteretic PWM
control scheme ensures high efficiency, fast switching,
and fast transient response. This control scheme is
simple: when the output voltage is below the regula-
tion threshold, the error comparator begins a switching
cycle by turning on the high-side switch. This switch
remains on until the minimum on-time expires and the
output voltage is above the regulation threshold plus
hysteresis or the inductor current is above the current-
limit threshold. Once off, the high-side switch remains
off until the minimum off-time expires and the output
voltage falls again below the regulation threshold.
During the off period, the low-side synchronous rectifi-
er turns on and remains on until either the high-side
switch turns on again or the inductor current
approaches zero. The internal synchronous rectifier
eliminates the need for an external Schottky diode.
The transition between PWM and hysteretic operation is
based on the number of consecutive zero-crossing
cycles. When more than 16 consecutive zero-crossing
cycles are detected, the DC-DC step-down converter
enables the bias for hysteretic operation. Once correct-
A
B
C
D
E
IN_
1.40V
1.40V
1.10V
OUT
EN
VID1
VID0
V DD
A: POWER CONNECTED TO IN1 AND IN2.
B: EN LOGIC INPUT PULLED HIGH, OUTPUT VOLTAGE IS SET TO CONDITION DEFINED BY THE DEFAULT VALUE OF THE I 2 C REGISTER FOR MODE0 (SEE TABLE 1).
C: OUTPUT VOLTAGE IS SET TO CONDITION DEFINED BY THE DEFAULT VALUE OF THE I 2 C REGISTER FOR MODE2.
D: OUTPUT VOLTAGE IS SET TO CONDITION DEFINED BY THE DEFAULT VALUE OF THE I 2 C REGISTER FOR MODE3.
E: V DD PULLED HIGH, ENABLING I 2 C INTERFACE.
Figure 2. Power-Up Sequence
12
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8952EWE+T | 功能描述:直流/直流开关调节器 2.5A Step-Down Regulator 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 |
| MAX8954EWN+ | 制造商:Maxim Integrated Products 功能描述:PMIC FOR PICO PROJECTORS - Rail/Tube |
| MAX8954EWN+T | 制造商:Maxim Integrated Products 功能描述:PMIC FOR PICO PROJECTORS - Tape and Reel |
| MAX8958EWW+ | 制造商:Maxim Integrated Products 功能描述:COMPLETE PMIC FOR INTEL ATOM PROCESSOR-BASED PLATFORM - Rail/Tube |
| MAX8958EWW+T | 制造商:Maxim Integrated Products 功能描述:COMPLETE PMIC FOR INTEL ATOM PROCESSOR-BASED PLATFORM - Tape and Reel 制造商:Maxim Integrated Products 功能描述:COMPLETE POWER MANAGEMENT IC FOR INTEL'S |
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