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参数资料
| 型号： | LTC3425EUH#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 5A 32QFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.4 V ~ 5.25 V |
| 输入电压： | 0.5 V ~ 4.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 100kHz ~ 2MHz |
| 电流 - 输出： | 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： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
LTC3425
PI FU CTIO S
I LIM (Pin 27): Current Limit Adjust Pin. Connect a resistor
from I LIM to SGND to set the peak current limit threshold
for the N-channel MOSFETs, according to the formula
(note that this is the peak current in each inductor):
SYNCIN (Pin 30): Oscillator Synchronization Pin. A clock
pulse width of 100ns minimum is required to synchronize
the internal oscillator. If not used, SYNCIN should be
grounded. The typical logic threshold for this input is:
I LIM =
130
R
V OUT
2
f OSC =
f SWITCH =
=
whereIisinAmpsandRisink?.Donotusevaluesless
than 75k.
R T (Pin 28): Connect a resistor from R T to SGND (or SGND
plane) to program the oscillator frequency, according to
the formula:
60
R T
f OSC 15
4 R T
where f OSC is in MHz and R T is in k ? .
V IN (Pin 29): Input Supply Pin. Connect this to the input
supply and decouple with 1 μ F minimum low ESR
ceramic capacitor.
The SYNCIN is ignored in Burst Mode operation.
SHDN (Pin 31): Shutdown Pin. Grounding SHDN (or
pulling it below 0.25V) shuts down the IC. Pull pin up to
≥ 1V to enable. Once enabled, the pin only needs to be
≥ 0.65V.
SS (Pin 32): Soft-Start pin. Connect a capacitor from this
pin to ground to set the soft-start time, according to the
formula:
t(ms) = C SS ( μ F) ? 320
The nominal soft-start charging current is 2.5 μ A. The
active range of SS is from 0.8V to 1.6V. Note that this is the
rise time of SS. The actual rise time of V OUT will be a
function of load and output capacitance.
Exposed Pad (Pin 33): Additional Power Ground for the
IC. Connect directly to the power ground plane.
OPERATING MODE
Automatic Burst (Operating Mode is Load Dependent)
Forced Burst
Forced Fixed Frequency with Pulse Skipping at Light Load
Forced Fixed Frequency, Low Noise (No Pulse Skipping)
BURST PIN
RC Network to Ground
Low
High
High
CCM PIN
Low
Low
Low
High
3425f
9
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| LTC3426ES6#TRMPBF | 功能描述:IC REG BOOST ADJ 2A TSOT23-6 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:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色产品:BD91x Series Step-Down Regulators 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:2 输出电压:3.3V，0.8 V ~ 2.5 V 输入电压:4.5 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:1MHz 电流 - 输出:1.5A 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:20-VFQFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:VQFN020V4040 产品目录页面:1373 (CN2011-ZH PDF) 其它名称:BD9152MUV-E2TR |
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