- 您现在的位置：买卖IC网 > PDF目录1837 > MAX1536ETI+ (Maxim Integrated Products)IC REG BUCK SYNC ADJ 3.6A 28TQFN PDF资料下载
参数资料
| 型号： | MAX1536ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3.6A 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.7 V ~ 5.5 V |
| 输入电压： | 3 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 3.6A |
| 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： | 28-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-
Down Regulator with Dynamic Output Voltage Control
Shutdown ( SHDN )
Drive SHDN low to disable the MAX1536 and reduce
the supply current to less than 1μA. In shutdown, all cir-
cuitry and internal MOSFETs turn off, and the LX node
Table 3. FBLANK Configuration Table
TYPICAL FORCED-PWM
FBLANK FAULT BLANKING
DURATION (μs)
becomes high impedance. Drive SHDN high or con-
nect to V CC for normal operation.
Summing Comparator
Three signals are added together at the input of the
V CC
Open
REF
AGND
Enabled
Enabled
Enabled
Disabled
150
100
50
100
summing comparator (Figure 2): an output-voltage
error signal relative to the reference voltage, an inte-
grated output-voltage error signal, and the sensed
PMOS switch current. The transconductance amplifier
with an external capacitor between COMP and V CC
provides an integrated error signal. This integrator pro-
vides high DC accuracy without the need for a high-
gain amplifier (see the Integrator Amplifier section).
Power-Good Output (PGOOD)
PGOOD is an open-drain output that indicates if the
output voltage is in regulation. PGOOD is actively held
low in shutdown and during soft-start. After the soft-
start terminates, PGOOD becomes high impedance as
long as the output voltage is within ±10% of the nominal
regulation voltage.
Once the MAX1536 has started, PGOOD pulls low when
the output voltage drops 10% below or rises 10% above
the nominal regulation voltage. PGOOD returns to high
impedance when the output voltage regains regulation.
For logic-level output voltages, connect a 100k ? external
pullup resistor between PGOOD and V CC .
PGOOD is forced high impedance during the transition
period selected by FBLANK (see the Fault Blanking
section).
NONSYNCHRONOUS STEP-DOWN SWITCHING REGULATOR
V IN
Fault Blanking (FBLANK)
The MAX1536 automatically enters forced-PWM opera-
tion for a predefined period following any GATE transi-
tion. The FBLANK control input determines how long the
MAX1536 maintains forced-PWM operation (Table 3).
When fault blanking is enabled (FBLANK = V CC , open,
or REF), the MAX1536 forces PGOOD to a high-imped-
ance state during the transition period selected by
FBLANK (Table 3). This prevents the PGOOD signal
from going low when the output-voltage change
( ? V OUT ) cannot occur as fast as the change in REFIN
voltage ( ? V REFIN ).
Synchronous Rectification
In a nonsynchronous step-down regulator, an external
Schottky diode provides a path for current to flow when
the inductor is discharging. The MAX1536 synchronous
rectifier replaces the external Schottky diode with an
internal low-resistance NMOS switch reducing conduc-
tion losses and improving efficiency (Figure 3). There is
typically 40ns of delay between MOSFET transitions,
thus preventing cross conduction or “shoot through.”
SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR
V IN
C IN
C IN
L
L
V OUT
V OUT
Figure 3. Step-Down Switching Regulator
C OUT
SYNCHRONOUS
RECTIFIER
C OUT
12
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1538ETI+T | IC PWR SOURCE SELECTOR 28-TQFN |
| MAX1541ETL+T | IC REG CTRLR DIVIDER PWM 40-TQFN |
| MAX1542ETP+T | IC DC-DC CONV TFT-LCD 20-TQFN |
| MAX1544ETL+ | IC QUICK-PWM DUAL-PHASE 40-TQFN |
| MAX1545ETL+ | IC QUICK-PWM DUAL-PHASE 40-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1536ETI+ | 功能描述:直流/直流开关调节器 3.6A 1.4MHz Step-Dwn w/Dynamic Out V 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 |
| MAX1536ETI+T | 功能描述:直流/直流开关调节器 3.6A 1.4MHz Step-Dwn w/Dynamic Out V 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 |
| MAX1536ETI-T | 功能描述:直流/直流开关调节器 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 |
| MAX1536EVKIT | 功能描述:直流/直流开关调节器 Evaluation Kit for the MAX1536 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 |
| MAX1537AETX+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
发布紧急采购，3分钟左右您将得到回复。