参数资料
| 型号： | LTC3561EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1A 8DFN |
| 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： | 0.8 V ~ 5 V |
| 输入电压： | 2.63 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 最高 4MHz |
| 电流 - 输出： | 1A |
| 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： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-DFN-EP（3x3） |
LTC3561
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
PV IN , SV IN Voltages ..................................... – 0.3V to 6V
V FB , SHDN/R T Voltages ................ – 0.3V to (V IN + 0.3V)
I TH Voltage ................................................ – 0.3V to 1.4V
SW Voltage ................................... – 0.3V to (V IN + 0.3V)
Operating Ambient Temperature Range
(Note 2) .................................................. – 40 ° C to 85 ° C
Junction Temperature (Notes 5, 8) ....................... 125 ° C
Storage Temperature Range ................. – 65 ° C to 125 ° C
TOP VIEW
SHDN/R T 1 8 I TH
SGND 2 7 V FB
9
SW 3 6 SV IN
PGND 4 5 PV IN
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
T JMAX = 125 ° C, θ JA = 43 ° C/W, θ JC = 3 ° C/W
EXPOSED PAD (PIN 9) MUST BE SOLDERED TO GROUND
ORDER PART NUMBER
LTC3561EDD
DD PART MARKING
LCJJ
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 3.3V, R T = 324k unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V IN
I FB
Operating Voltage Range
Feedback Pin Input Current
(Note 3)
2.625
5.5
± 0.1
V
μ A
V FB
? V LINEREG
? V LOADREG
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
(Note 3)
V IN = 2.7V to 5V
I TH = 0.36, (Note 3)
I TH = 0.84, (Note 3)
●
●
●
0.784
0.8
0.04
0.02
– 0.02
0.816
0.2
0.2
– 0.2
V
%/V
%
%
g m(EA)
I S
V SHDN/RT
Error Amplifier Transconductance
Input DC Supply Current (Note 4)
Active Mode
Shutdown
Shutdown Threshold High
Active Oscillator Resistor
I TH Pin Load = ± 5 μ A (Note 3)
V FB = 0.75V
V SHDN/RT = 3.3V
800
240 350
0.1 1
V IN – 0.6 V IN – 0.4
324k 1M
μ S
μ A
μ A
V
?
f OSC
I LIM
R DS(ON)
I SW(LKG)
V UVLO
Oscillator Frequency
Peak Switch Current Limit
Top Switch On-Resistance (Note 6)
Bottom Switch On-Resistance (Note 6)
Switch Leakage Current
Undervoltage Lockout Threshold
R T = 324k
(Note 7)
I TH = 1.3
V IN = 3.3V
V IN = 3.3V
V IN = 6V, V ITH/RUN = 0V, V FB = 0V
V IN Ramping Down
0.85
1.4
2.375
1 1.15
4
1.7
0.11 0.15
0.11 0.15
0.01 1
2.5 2.625
MHz
MHz
A
?
?
μ A
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime. No pin shall exceed 6V.
Note 2: The LTC3561E is guaranteed to meet specified performance from
0 ° C to 85 ° C. Specifications over the – 40 ° C to 85 ° C operating ambient
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: The LTC3561 is tested in a feedback loop which servos V FB to the
midpoint for the error amplifier (V ITH = 0.6V).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
3561f
2
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