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参数资料
| 型号： | MAX1714BEEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 占空比： | 100% |
| 电源电压： | 4.5 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
High-Speed Step-Down Controller
for Notebook Computers
Table 1. Component Selection for Standard Applications
COMPONENT
Input Range
Frequency
Q1 High-Side
MOSFET
Q2 Low-Side
MOSFET
D2 Rectifier
L1 Inductor
C1 Input Capacitor
C2 Output Capacitor
2.5V AT 4A
7V to 20V
300kHz
Fairchild Semiconductor
1/2 FDS6982A
Fairchild Semiconductor
1/2 FDS6982A
Nihon EP10QY03
6.8μH
Coilcraft DO3316P-682
10μF, 25V
Taiyo Yuden TMK432BJ106KM
470μF, 6V
Kemet T510X477108M006AS
1.6V AT 8A
7V to 20V
300kHz
International Rectifier
IRF7811
Fairchild Semiconductor
FDS6670A
Motorola MBRS340T3
1.5μH
Sumida CEP1251R5MC
(2) 10μF, 25V
Taiyo Yuden TMK432BJ106KM
(2) 470μF 6V
Kemet T510X477108M006AS
2.5V AT 1.5A
4.5V to 5.5V
600kHz
International Rectifier
1/2 IRF7301
International Rectifier
1/2 IRF7301
Motorola MBR0520LT1
3.3μH
Coiltronics UP1B-3R3
100μF, 10V
Sanyo POSCAP 10TPA100M
100μF, 10V
Sanyo POSCAP 10TPA100M
Table 2. Component Suppliers
MANUFACTURER
AVX
Central Semiconductor
Coilcraft
Coiltronics
Fairchild
International Rectifier
Kemet
Matsuo
Motorola
Murata
NIEC (Nihon)
Sanyo
Siliconix
Sprague
Sumida
Taiyo Yuden
TDK
USA PHONE
803-946-0690
516-435-1110
847-639-6400
561-241-7876
408-822-2181
310-322-3331
408-986-0424
714-969-2491
602-303-5454
814-237-1431
800-831-9172
805-867-2555*
619-661-6835
408-988-8000
800-554-5565
603-224-1961
847-956-0666
408-573-4150
847-390-4461
FACTORY FAX
[Country Code]
[1] 803-626-3123
[1] 516-435-1824
[1] 847-639-1469
[1] 561-241-9339
[1] 408-721-1635
[1] 310-322-3332
[1] 408-986-1442
[1] 714-960-6492
[1] 602-994-6430
[1] 814-238-0490
[81] 3-3494-7414
[81] 7-2070-1174
[1] 408-970-3950
[1] 603-224-1430
[81] 3-3607-5144
[1] 408-573-4159
[1] 847-390-4405
ply the PWM circuit and gate drivers. If stand-alone
capability is needed, the +5V supply can be generated
with an external linear regulator such as the MAX1615.
The battery and +5V bias inputs can be tied together if
the input source is a fixed +4.5V to +5.5V supply. If the
+5V bias supply is powered up prior to the battery sup-
ply, the enable signal ( SHDN ) must be delayed until the
battery voltage is present in order to ensure startup. The
+5V bias supply must provide V CC and gate-drive
power, so the maximum current drawn is:
I BIAS = I CC + f (Q G1 + Q G2 ) = 5mA to 30mA (typ)
where I CC is 600μA typical, f is the switching frequency,
and Q G1 and Q G2 are the MOSFET data sheet total
gate-charge specification limits at V GS = 5V.
Free-Running, Constant-On-Time PWM
Controller with Input Feed-Forward
The Quick-PWM control architecture is a pseudo-fixed-fre-
quency, constant-on-time current-mode type with voltage
feed-forward (Figure 2). This architecture relies on the out-
put filter capacitor’s ESR to act as the current-sense resis-
tor, so the output ripple voltage provides the PWM ramp
*Distributor
+5V Bias Supply (V CC and V DD )
The MAX1714 requires an external +5V bias supply in
addition to the battery. Typically, this +5V bias supply is
the notebook ’s 95% efficient +5V system supply.
Keeping the bias supply external to the IC improves effi-
ciency and eliminates the cost associated with the +5V
linear regulator that would otherwise be needed to sup-
signal. The control algorithm is simple: the high-side
switch on-time is determined solely by a one-shot whose
period is inversely proportional to input voltage and direct-
ly proportional to output voltage. Another one-shot sets a
minimum off-time (400ns typical). The on-time one-shot is
triggered if the error comparator is low, the low-side switch
current is below the current-limit threshold, and the mini-
mum off-time one-shot has timed out.
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1714BEEE+ | 功能描述:电流型 PWM 控制器 Step-Down Controller for Notebook RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1714BEEE+T | 功能描述:电流型 PWM 控制器 Step-Down Controller for Notebook RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1714BEEE-T | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1714BEEE-TG074 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1714BEVKIT | 功能描述:电流型 PWM 控制器 Evaluation Kit for the MAX1714B RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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