- 您现在的位置：买卖IC网 > PDF目录13573 > MAX8649AEWE+T (Maxim Integrated Products)IC REG BUCK SYNC ADJ 1.8A 16WLP PDF资料下载
参数资料
| 型号： | MAX8649AEWE+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 1.8A 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： | 0.75 V ~ 1.38 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 频率 - 开关： | 3.25MHz |
| 电流 - 输出： | 1.8A |
| 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） |
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页当前第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
1.8A Step-Down Regulator with
Remote Sense in 2mm x 2mm WLP
Enable
The DC-DC step-down regulators are enabled/disabled
using the EN logic input. The EN input is able to handle
input voltages up to V IN1 , ensuring 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
pulldown resistor can be disabled through the
CONTROL register (see Table 7) once the ICs are
enabled, achieving lowest possible quiescent current.
When EN is low, the CONTROL register is reset to
default, enabling the pulldown resistors on EN, VID0,
and VID1. See Figures 2 and 3 for detailed information
on power-up and power-down sequencing and opera-
tion mode changes.
DC-DC Regulator Operating Modes
The ICs operate in one of four modes determined by
the state of the VID_ inputs (see Table 1). At power-up,
the ICs are default set to operate in power-save opera-
tion for MODE1 and forced-PWM mode for MODE0,
MODE2, and MODE3. For each of the operation modes,
MODE0 to MODE3, the DC-DC step-down regulators
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 PWM switching frequency
depends on the load current. For medium to high load
condition, the ICs operate in fixed-frequency PWM
mode. For light load conditions, the ICs operate in hys-
teretic 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 regulation thresh-
old, 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 volt-
age 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 volt-
age falls again below the regulation threshold. During
the off period, the low-side synchronous rectifier 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.
A
B
C
D
E
IN
1.27V
1.23V
1.05V
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 I 2 C REGISTER FOR MODE1.
D: OUTPUT VOLTAGE IS SET TO CONDITION DEFINED BY THE DEFAULT VALUE OF I 2 C REGISTER FOR MODE3.
E: V DD PULLED HIGH, ENABLING I 2 C INTERFACE.
Figure 2. Power-Up Sequence
12
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6828LUT+T | IC MPU SUPERVISOR SOT23-6 |
| MAX8649EWE+T | IC REG BUCK SYNC ADJ 1.8A 16WLP |
| MAX6826LUT+T | IC MPU SUPERVISOR SOT23-6 |
| MAX1595ETC33+T | IC REG MULTI CONFIG 3.3V 12TQFN |
| SC1608C-102 | INDUCTOR SMD 1000UH .045A 100KHZ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8649BEWE+T | 功能描述:直流/直流开关调节器 1.8A 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 |
| MAX8649EVKIT+ | 制造商:Maxim Integrated Products 功能描述:1.8A STEP-DOWN REGULATOR W/DIFFERENTIAL REMOTE SENSE IN 2MM - Boxed Product (Development Kits) |
| MAX8649EWE+ | 制造商:Maxim Integrated Products 功能描述:1.8A STEP-DOWN REGULATOR W/DIFFEREN - Rail/Tube |
| MAX8649EWE+T | 功能描述:直流/直流开关调节器 1.8A 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 |
| MAX8649SEWE+T | 功能描述:直流/直流开关调节器 1.8A 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 |
发布紧急采购，3分钟左右您将得到回复。