参数资料
| 型号： | MAX15101EWL+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1A 15WLP |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.6 V ~ 5.2 V |
| 输入电压： | 1.7 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.025V @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 15-WFBGA, WLBGA |
| 供应商设备封装： | 15-WLP (2.65x1.57) |
| 包装： | 带卷 (TR) |
MAX15101
Small 1A, Low-Dropout Linear Regulator
in a 2.7mm x 1.6mm Package
Enable
A logic-low on EN disables the MAX15101. In shutdown,
the pass transistor, control circuitry, reference, and all
biases are turned off, reducing supply current to typically
1 F A. Connect EN to IN for normal operation. In shutdown,
the soft-start capacitor is discharged using an internal
pulldown resistance.
Soft-Start
As shown in the Typical Operating Circuit , the MAX15101
uses a g M stage and integrating capacitor C SS to control
the regulator’s feedback set point. When EN is driven
low, the soft-start capacitor is discharged. When EN is
driven high or power is applied to the device, a constant
9.2 F A current charges the soft-start capacitor. At startup,
the feedback set point increases linearly, which reduces
the inrush supply current.
t SS = 6.315 x 10 -5 x C SS
where C SS is in nF. Use capacitor values between 30nF
to 100nF with voltage ratings greater than 5V.
Because this ramp is applied to the current-limit com-
parator, the actual time for the output voltage to ramp up
depends on the load current and output capacitor. Leave
SS_BYP unconnected to disable soft-start.
Foldback Current Limiting
The MAX15101 features a 1.6A current limit when the
output voltage is in regulation. When the voltage at the
output drops to 17% of its nominal value, the current
limit exponentially folds back to 1A. The output can be
shorted to ground for an indefinite period of time without
damaging the device. Avoid continuous output current of
greater than 1A to prevent damage to the regulator.
Operating Region and Power Dissipation
The power dissipation across the device is P = I OUT
(V IN - V OUT ). The resulting maximum power dissipation is:
P MAX = [(T J(MAX) - T A )/( B JA )]
where (T J(MAX) - T A ) is the temperature difference
between the maximum allowed die junction (+150 N C) and
the surrounding air. Figure 1 shows the allowable power
dissipation for typical PCBs at +25 N C, +50 N C, and +70 N C
ambient temperatures (refer to the MAX15101 EV kit).
Applications Information
Capacitor Selection and Regulator Stability
Capacitors are required at the MAX15101’s input and
output. Connect at least a 2.2 F F capacitor between IN
and GND (C IN ) and a 10 F F capacitor between OUT and
GND (C OUT ). Use only surface-mount ceramic capaci-
tors that have low equivalent series resistance (ESR).
Make the input and output traces at least 2.5mm wide,
and connect C IN and C OUT within 6mm of the IC to mini-
mize the impact of PCB trace inductance.
The output capacitor’s ESR can affect stability and output
noise. Use capacitors with 50m I or less ESR to ensure
stability and optimum transient response. This is par-
ticularly true in applications with very low output voltage
(< 2V) and high output current (> 0.5A).
Since some capacitor dielectrics can vary over bias volt-
age and temperature, consult the capacitor manufacturer
specifications to ensure that the capacitors meet these
requirements over all combinations of operating voltage
and temperature.
Thermal-Overload Protection
A thermal-overload circuit limits total power dissipation in
the MAX15101. When the junction temperature exceeds
T J = +160 N C, the thermal sensor turns off the pass tran-
sistor, allowing the IC to cool. The thermal sensor turns
the pass transistor on once the IC’s junction temperature
drops approximately 15 N C. Continuous short-circuit condi-
tions will consequently result in a foldback limited output.
Thermal-overload protection is designed to safeguard
the MAX15101 in the event of fault conditions. For contin-
uous operation, do not exceed the junction temperature
rating of T J = +125 N C.
1.25
1.00
0.75
0.50
0.25
0
MAXIMUM CONTINUOUS CURRENT
T A = +25NC
T A = +70NC
T A = +50NC
T J = +125NC (BASED ON MAX15101 EV KIT)
0
1
2
3
4
5
INPUT-OUTPUT DIFFERENTIAL VOLTAGE (V)
Figure 1. Maximum Output Current Curves
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相关代理商/技术参数 |
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| MAX15102AWL+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX15102AWL+T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
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| MAX15102EWL+T | 功能描述:低压差稳压器 - LDO 2A Sync Step-Down Switch Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX15103AWL+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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