参数资料
型号: LTC3530EDD#PBF
厂商: Linear Technology
文件页数: 5/16页
文件大小: 0K
描述: IC REG BUCK BOOST SYNC ADJ 10DFN
标准包装: 121
类型: 降压(降压),升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 1.8 V ~ 5.25 V
输入电压: 1.8 V ~ 5.5 V
PWM 型: Burst Mode?
频率 - 开关: 300kHz ~ 2MHz
电流 - 输出: 600mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
包装: 管件
供应商设备封装: 10-DFN(3x3)
产品目录页面: 1334 (CN2011-ZH PDF)
LTC3530
TYPICAL PERFORMANCE CHARACTERISTICS
Load Transient Response in
T A = 25°C, unless otherwise speci?ed.
Load Transient Response in Fixed
Auto Burst Mode Operation,
Frequency Mode, No Load to 300mA
No Load to 500mA
Typical Burst Mode Waveforms
V OUT
100mV/DIV
LOAD
0.25A/DIV
V OUT
100mV/DIV
LOAD
0.25A/DIV
V OUT
50mV/DIV
INDUCTOR
CURRENT
0.25A/DIV
100 μ s/DIV
3530 G13
100 μ s/DIV
3530 G14
22 μ s/DIV
3530 G15
V IN = 3.6V
V OUT = 3.3V
C OUT = 22 μ F, X5R CERAMIC
Transition from Burst Mode
V IN = 3.6V
V OUT = 3.3V
C OUT = 47 μ F, X5R CERAMIC + 100 μ F
LOW ESR TANTALUM
C OUT = 22 μ F, X5R CERAMIC
V OUT
200mV/DIV
BURST
2V/DIV
Operation to Fixed Frequency Mode
2000
1800
1600
1400
1200
Maximum Output Current vs V IN
INDUCTOR
CURRENT
1000
I OUT
0.5A/DIV
200 μ s/DIV
C OUT = 22 μ F, X5R CERAMIC
3530 G16
800
600
400
250mA AT 1.8V
200
1.5
2.5
3.5
4.5
5.5
PIN FUNCTIONS
V IN (V)
3530 G17
R T (Pin 1): Programs the Frequency of the Internal Oscil-
lator. Connect a resister from R T to ground.
f(kHz) = 33,170/R T (k Ω )
BURST (Pin 2): Used to Set the Automatic Burst Mode
Threshold. Connect a resistor and capacitor in parallel
from this pin to ground. See the Applications Information
section for component value selection. For manual control,
ground the pin to force Burst Mode operation, connect to
V IN to force ?xed frequency PWM mode.
SW1 (Pin 3): Switch Pin Where the Internal Switches A and
B are Connected. Connect inductor from SW1 to SW2. An
optional Schottky diode can be connnected from SW1 to
ground for a moderate ef?ciency improvement. Minimize
trace length to keep EMI down.
SW2 (Pin 4): Switch Pin Where the Internal Switches C
and D are Connected. For applications with output voltages
over 4.3V, a Schottky diode is required from SW2 to V OUT
to ensure the SW pin does not exhibit excessive voltage.
3530fb
5
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