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| 型号： | ISL8013AIRZ |
| 厂商： | Intersil |
| 文件页数： | 14/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 16QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 75 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5.5 V |
| 输入电压： | 2.8 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 3A |
| 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-VQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-QFN（4x4） |
ISL8013A
.
CLOCK
I L
0
PWM
8 CYCLES
PFM
PFM CURRENT LIMIT
LOAD CURRENTT
NOMINAL +1.5%
V OUT
NOMINAL
FIGURE 37. SKIP MODE OPERATION WAVEFORMS
PG
During power-up, the open-drain power good output
holds low for about 1ms after V OUT reaches the
regulation voltage. The PG output also serves as a 1ms
delayed the Power Good signal when the pull-up resistor
R 1 is installed.
UVLO
When the input voltage is below the undervoltage
lock-out (UVLO) threshold, the regulator is disabled.
Soft Start-Up
The soft-start-up reduces the inrush current during the
start-up. The soft-start block outputs a ramp reference to
the input of the error amplifier. This voltage ramp limits
the inductor current as well as the output voltage speed
so that the output voltage rises in a controlled fashion.
When VFB is less than 0.2V at the beginning of the
soft-start, the switching frequency is reduced to 1/3 of
the nominal value so that the output can start-up
smoothly at light load condition. During soft-start, the IC
operates in the SKIP mode to support pre-biased output
condition.
Enable
The enable (EN) input allows the user to control the
turning on or off the regulator for purposes such as
power-up sequencing. When the regulator is enabled,
there is typically a 600μs delay for waking up the
bandgap reference and then the soft-start-up begins.
Discharge Mode (Soft-Stop)
100% Duty Cycle
The ISL8013A features 100% duty cycle operation to
maximize the battery life. When the battery voltage
drops to a level that the ISL8013A can no longer
maintain the regulation at the output, the regulator
completely turns on the P-MOSFET. The maximum
dropout voltage under the 100% duty-cycle operation is
the product of the load current and the ON-resistance of
the P-MOSFET.
Thermal Shut-Down
The ISL8013A has built-in thermal protection. When the
internal temperature reaches +140°C, the regulator is
completely shut down. As the temperature drops to
+115°C, the ISL8013A resumes operation by stepping
through the soft-start.
Applications Information
Output Inductor and Capacitor Selection
To consider steady state and transient operations,
ISL8013A typically uses a 1.5μH output inductor. The
higher or lower inductor value can be used to optimize
the total converter system performance. For example, for
higher output voltage 3.3V application, in order to
decrease the inductor current ripple and output voltage
ripple, the output inductor value can be increased. It is
recommended to set the ripple inductor current
approximately 30% of the maximum output current for
optimized performance. The inductor ripple current can
be expressed as shown in Equation 1:
V O ? ? 1 – --------- ?
L ? f S
When a transition to shutdown mode occurs or the V IN
UVLO is set, the outputs discharge to GND through an
internal 100 Ω switch.
? V O ?
? V IN ?
Δ I = -------------------------------------
(EQ. 1)
Power MOSFETs
The power MOSFETs are optimized for best efficiency.
The ON-resistance for the P-MOSFET is typically 50m Ω
and the ON-resistance for the N-MOSFET is typically
50m Ω .
14
The inductor’s saturation current rating needs to be at
least larger than the peak current. The ISL8013A
protects the typical peak current 4.8A. The saturation
current needs be over 5.5A for maximum output current
application.
ISL8013A uses internal compensation network and the
output capacitor value is dependent on the output
FN7526.0
November 25, 2009
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| ISL8013AIRZ-T | 功能描述:IC REG BUCK SYNC ADJ 3A 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| ISL8013AIRZ-T7A | 功能描述:IC REG BUCK SYNC ADJ 3A 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| ISL8013EVAL2Z | 功能描述:EVALUATION BOARD FOR ISL8013 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8013IRZ | 功能描述:直流/直流开关转换器 3A LW QUIESCENT CUR 1 6MHZ 4X4 16LD RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| ISL8013IRZS2715 | 制造商:Intersil Corporation 功能描述:S SPEC FOR TRACKING BROADCOM BUSINESS ONLY-SOLD THRU DISTI - Rail/Tube |
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