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| 型号： | MAX1587CETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/30页 |
| 文件大小： | 0K |
| 描述： | IC POWER MANAGEMENT 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 手持/移动设备 |
| 电源电压： | 2.6 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 带卷 (TR) |
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High-Efficiency, Low-I Q PMICs with
Dynamic Core for PDAs and Smart Phones
ELECTRICAL CHARACTERISTICS (continued)
Note 1: Dropout voltage is guaranteed by the p-channel switch resistance and assumes a maximum inductor resistance of 45m Ω .
Note 2: The PWM-skip-mode transition has approximately 10mA of hysteresis.
Note 3: The maximum output current is guaranteed by the following equation:
I LIM ?
1 + ( R N + R L )
where:
I OUT ( MAX ) =
V OUT (1 ? D)
2 x f x L
( 1 ? D )
2 x f x L
D =
V OUT + I OUT(MAX ) (R N + R L )
V IN + I OUT ( MAX ) ( R N ? R P )
and
R N = n-channel synchronous rectifier R DS(ON)
R P = p-channel power switch R DS(ON)
R L = external inductor ESR
I OUT(MAX) = maximum required load current
f = operating frequency minimum
L = external inductor value
I LIM can be substituted for I OUT(MAX) (desired) when solving for D. This assumes that the inductor ripple current is
small relative to the absolute value.
Note 4: POK only indicates the status of supplies that are enabled (except V7). When a supply is turned off, POK does not trigger
low. When a supply is turned on, POK immediately goes low until that supply reaches regulation. POK is forced low when all
supplies (except V7) are disabled.
Note 5: Specifications to -40°C are guaranteed by design, not production tested.
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