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参数资料
| 型号： | LTC3252EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SWITCHED CAP 12DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），切换电容（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.9 V ~ 1.6 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1MHz ~ 1.6MHz |
| 电流 - 输出： | 250mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN（4x3） |
LTC3252
ABSOLUTE
(Notes 1, 6)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
V IN to GND ................................................ – 0.3V to 6.0V
EN1, EN2, FB1, FB2 to GND .......... – 0.3V to (V IN + 0.3V)
FB1
1
TOP VIEW
12 FB2
ORDER PART
NUMBER
I OUT1 , I OUT2 (Note 3) ........................................... 400mA
Operating Ambient Temperature Range
(Note 2) .................................................. – 40 ° C to 85 ° C
Storage Temperature Range ................. – 65 ° C to 125 ° C
Lead Temperature (Soldering, 10 sec).................. 300 ° C
EN1 2 11 EN2
V IN 3 10 C2 +
C1 + 4 9 OUT2
OUT1 5 8 C2 –
C1 – 6 7 GND
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
EXPOSED PAD IS GROUND
LTC3252EDE
DE PART
MARKING
3252
(MUST BE SOLDERED TO PCB)
T JMAX = 125 ° C, θ JA = 40 ° C/W, θ JC = 4.3 ° C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 3.6V, V OUT1 = V OUT2 = 1.5V, C1 = C2 = 1 μ F, Cin = C OUT1 = C OUT2 =
4.7 μ F (all capacitors ceramic) unless otherwise noted.
SYMBOL
V IN
PARAMETER
Min Operating Voltage
CONDITIONS
(Note 4)
q
MIN
2.7
TYP
MAX
UNITS
V
Max Operating Voltage
q
5.5
V
I VIN
Operating Current,
Both Outputs Enabled
Operating Current,
One Output Enabled
Shutdown Current
I OUT = 0mA, V EN1 = V IN , V EN2 = V IN ,
2.7V ≤ V IN ≤ 5.5V
I OUT = 0mA, V EN1 = 0, V EN2 = V IN or V EN1 = V IN ,
V EN2 = 0, 2.7V ≤ V IN ≤ 5.5V
V M0 = 0V, V M1 = 0V, 2.7V ≤ V IN ≤ 5.5V
q
q
q
60
35
0.01
100
60
1
μ A
μ A
μ A
V FB1 , V FB2
I OUT1
I OUT2
I FB
Feedback Voltage
Output Current
Output Current
FB1, FB2 Input Current
I OUT = 0mA, 2.7V ≤ V IN ≤ 5.5V
V EN1 = V IN
V EN2 = V IN
V FB1 = V FB2 = 0.85V
q
q
q
q
0.78
250
250
– 50
0.8
0.82
50
V
mA
mA
nA
V RIPPLE
Output Ripple (OUT1 or OUT2)
I OUT = 250mA
10
mV P-P
Spread Spectrum Frequency Range
f MIN Switching Frequency
f MAX Switching Frequency
q
q
0.8
1.0
1.6
2.0
MHz
MHz
V IH
EN1, EN2 Input High Voltage
2.7V ≤ V IN ≤ 5.5V
q
1.2
0.8
V
V IL
I IH
I IL
t ON
EN1, EN2 Input Low Voltage
EN1, EN2 Input High Current
EN1, EN2 Input Low Current
Turn On Time
2.7V ≤ V IN ≤ 5.5V
EN1 = V IN , EN2 = V IN
EN1 = 0V, EN2 = 0V
R OUT = 3 ?
q
q
q
–1
–1
0.8
0.8
0.4
1
1
V
μ A
μ A
ms
OUT1, OUT2 Load Regulation (Referred to FB pin)
0.08
mV/mA
Line Regulation
0 ≤ I OUT1 ≤ 250mA or 0 ≤ I OUT2 ≤ 250mA
0.2
%/V
R OL
Open Loop Output Impedance,
V IN = 3.0V, I OUT = 200mA, V FB = 0.74V (Note 5)
q
1
1.4
?
(OUT1 or OUT2)
3252f
2
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| LTC3255EDD#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-DFN 制造商:Linear Technology 功能描述:IC, STEP DWN CHARGE PUMP, 500KHZ, DFN-10 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Wide VIN Range Fault Protected 50mA Step-Down Ch |
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