参数资料
型号: MAX8934CETI+T
厂商: Maxim Integrated Products
文件页数: 12/32页
文件大小: 0K
描述: IC BATTERY CHARGER DUAL 28TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: Smart Power Selector™
功能: 充电管理
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4.1 V ~ 6.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(4x4)
包装: 带卷 (TR)
MAX8934A–MAX8934E
Dual-Input Linear Chargers, Smart Power Selector
with Advanced Battery Temperature Monitoring
Typical Operating Characteristics (continued)
(MAX8934A, T A = +25 N C, circuit of Figure 2, V DC = 6V, V BATT = 3.6V, thermistor Beta = 3964, unless otherwise noted. Negative bat-
tery current indicates charging.)
3.35
3.30
LDO OUTPUT VOLTAGE vs. LDO OUTPUT
CURRENT (USB DISCONNECTED)
V BATT = 4.0V
V BATT
LDO STARTUP WAVEFORMS
MAX8934A/B/C toc27
I LDO = 0
3.6V
2V/div
3.25
3.20
3.15
DC UNCONNECTED
V DC = 5.0V
V LDO
3.3V
2V/div
3.10
3.05
3.00
I BATT
50mA/div
2.95
0
25
50
75
100
125
150
175
400 F s/div
LDO OUTPUT CURRENT (mA)
3.5
LDO OUTPUT VOLTAGE vs.
BATTERY VOLTAGE
0
ALWAYS-ON LDO POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
3.0
2.5
2.0
1.5
1.0
0.5
V BATT FALLING
V BATT RISING
-5
-10
-15
-20
-25
-30
-35
-40
-45
V SYS = 3.6V
I LDO = 10mA
RESISTIVE LOAD
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-50
0.1
1
10
100
BATTERY VOLTAGE (V)
FREQUENCY (kHz)
900
LDO NOISE DENSITY
vs. FREQUENCY
THM NORMAL TO THM COLD
(< T2) TRANSITION
MAX8934A/B/C toc31
800
700
V BATT = 3.8V,
I LDO = 10mA
RESISTIVE LOAD
V THM
500mV/div
600
500
V BATT
2.2V
3.6V
2V/div
400
1A
300
200
I BATT
500mA
500mA/div
100
0
0.01
0.1
1
10
100
1000 10,000
10ms/div
FREQUENCY (kHz)
12
Maxim Integrated
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