参数资料
型号: LTC4053EDD-4.2#TRPBF
厂商: Linear Technology
文件页数: 14/16页
文件大小: 0K
描述: IC CHARGER BATTERY USB 10-DFN
标准包装: 2,500
功能: 充电管理
电池化学: 锂离子(Li-Ion)
电源电压: 4.25 V ~ 6.5 V
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
供应商设备封装: 10-DFN(3x3)
包装: 带卷 (TR)
LTC4053-4.2
APPLICATIO S I FOR ATIO
PROG pin. With no additional capacitance on the PROG
pin, stability is acceptable with program resistor values as
high as 50k. However, additional capacitance on this node
reduces the maximum allowed program resistor. The pole
frequency at the PROG pin should be kept above 500kHz.
Therefore, if the PROG pin is loaded with a capacitance, C,
the following equation should be used to calculate the
maximum resistance value for R PROG :
R PROG < 1/(6.283 ? 5 × 10 5 ? C)
LTC4053
Average, rather than instantaneous, battery current may
be of interest to the user. For example, if a switching power
supply operating in low-current mode is connected in
parallel with the battery the average current being pulled
out of the BAT pin is typically of more interest than the
instantaneous current pulses. In such a case, a simple RC
filter can be used on the PROG pin to measure the average
battery current as shown in Figure 5. A 10k resistor is
added between the PROG pin and the filter capacitor and
monitoring circuit to ensure stability.
PROG
GND
7
R PROG
10k
C FILTER
CHARGE
CURRENT
MONITOR
CIRCUITRY
5
4053 F05
Figure 5. Isolating Capacitive Load on PROG Pin and Filtering
PACKAGE DESCRIPTIO
DD Package
10-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
0.675 ± 0.05
R = 0.115
TYP
6
10
0.38 ± 0.10
3.50 ± 0.05 1.65 ± 0.05
2.15 ± 0.05 (2 SIDES)
PACKAGE
PIN 1
TOP MARK
3.00 ± 0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
OUTLINE
(SEE NOTE 6)
(DD10) DFN 1103
0.25 ± 0.05
0.50
0.200 REF
0.75 ± 0.05
5
1
0.25 ± 0.05
0.50 BSC
BSC
2.38 ± 0.10
NOTE:
2.38 ± 0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.00 – 0.05
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2).
CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
4053fa
14
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