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1.2A PWM Step-Down Converter in
2mm x 2mm WLP/UCSP for PA Power
______________________________________________________________________________________ 11
For the LDO, use an input capacitance equal to the
value of the output capacitance of LDO2. Larger input
capacitor values and lower ESR provide better noise
rejection and line-transient response.
Note that some ceramic dielectrics exhibit large capaci-
tance and ESR variation with temperature. With
dielectrics such as Z5U and Y5V, it may be necessary to
use two times the output capacitor value of LDO2 (or
larger) to ensure stability at temperatures below -10癈.
With X7R or X5R dielectrics, a capacitance equal to the
output capacitor value is sufficient at all operating tem-
peratures.
Thermal Considerations
In most applications, the MAX8836Z does not dissipate
much heat due to the high efficiency. However, in
applications where the MAX8836Z operates at high
ambient temperature with heavy loads, the heat dissi-
pated may exceed the maximum junction temperature
of the IC. If the junction temperature reaches approxi-
mately +160癈, all power switches are turned off and
LX and PA_ become high impedance, and LDO2 is
pulled down to ground through an internal 1k& pull-
down resistor.
Table 1. Suggested Inductors
MAN FA T RER    SERIES
INDUCTANCE
(礖)
ESR
(&)
CURRENT RATING
(mA)
DIMENSIONS
(mm)
Coilcraft
LPO3310
1.0
1.5
2.2
0.07
0.10
0.13
1600
1400
1100
. x . x1. =11mm
3
MIPF2520
1.0
1.5
2.2
0.05
0.07
0.08
1500
1500
1300
2. x2. x1. = mm
3
MIPS2520
1.3
2.0
0.09
0.11
1500
1200
2. x2. x1. = mm
3
FDK
MIPF2016
1.0
2.2
0.11
1100
2. x1. x1. = .2mm
3
Murata
LQH32C_53
1.0
2.2
0.06
0.10
1000
790
.2x2. x1.7=14mm
3
Sumida
CDRH2D09
1.2
1.5
2.2
0.08
0.09
0.12
590
520
440
. x . x1. = mm
3
CDRH2D11
1.5
2.2
3.3
0.05
0.08
0.10
680
580
450
.2x .2x1.2=12mm
3
Taiyo Yuden
CB2518T
2.2
4.7
0.09
0.13
510
340
2. x1. x2. = mm
3
D3010FB
1.0
0.20
1170
. x . x1. = mm
3
D2812C
1.2
2.2
0.09
0.15
860
640
. x . x1.2=11mm
3
D310F
1.5
2.2
0.13
0.17
1230
1080
. x . x1. =1 mm
3
TOKO
D312C
1.5
2.2
0.10
0.12
1290
1140
. x . x1.2=1 mm
3
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相关代理商/技术参数
MAX8836ZEWEEE+ 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX8836ZEWEEE+T 制造商:Maxim Integrated Products 功能描述:
MAX883C/D 功能描述:低压差稳压器 - LDO 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
MAX883C/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX883CPA 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear 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
MAX883CPA+ 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear 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
MAX883CSA 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear 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
MAX883CSA+ 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear 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