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参数资料
| 型号： | MAX1653EEE-T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/28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： | 2,500 |
| PWM 型： | 电流模式，混合 |
| 输出数： | 1 |
| 频率 - 最大： | 350kHz |
| 占空比： | 98% |
| 电源电压： | 4.5 V ~ 30 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： | 带卷 (TR) |
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High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
output voltage as determined by the turns ratio is +15V,
the feedback resistor ratio should be set to produce
about +13.5V; otherwise, the SECFB one-shot might be
triggered unintentionally, causing an unnecessary
increase in supply current and output noise. In negative-
output (MAX1654) applications, the resistor-divider acts
as a load on the internal reference, which in turn can
cause errors at the main output. Avoid overloading REF
(see the Reference Load-Regulation Error vs. Load
Current graph in the Typical Operating Characteristics).
100k ? is a good value for R3 in MAX1654 circuits.
Output current on secondary winding applications is
limited at low input voltages. See the MAX1652
Maximum Secondary Output Current vs. Supply Voltage
graph in the Typical Operating Characteristics for data
from the application circuit of Figure 8.
Soft-Start Circuit (SS)
Soft-start allows a gradual increase of the internal cur-
rent-limit level at start-up for the purpose of reducing
input surge currents, and perhaps for power-supply
sequencing. In shutdown mode, the soft-start circuit
holds the SS capacitor discharged to ground. When
SHDN goes high, a 4μA current source charges the SS
capacitor up to 3.2V. The resulting linear ramp wave-
form causes the internal current-limit level to increase
proportionally from 0 to 100mV. The main output capaci-
tor thus charges up relatively slowly, depending on the
SS capacitor value. The exact time of the output rise
depends on output capacitance and load current and is
typically 1ms per nanofarad of soft-start capacitance.
With no SS capacitor connected, maximum current limit
is reached within 10μs.
Shutdown
Shutdown mode ( SHDN = 0V) reduces the V+ supply
current to typically 3μA. In this mode, the reference and
VL are inactive. SHDN is a logic-level input, but it can
be safely driven to the full V+ range. Connect SHDN to
V+ for automatic start-up. Do not allow slow transitions
(slower than 0.02V/μs) on SHDN .
22 μ F, 35V
22 μ F, 35V
V IN (6.5V TO 18V)
+15V AT
2
SECFB
7
FB
11
VL
V+
C2
4.7 μ F
10
D1
CMPSH
-3A
C2
4.7 μ F
C3
15 μ F
210k, 1%
49.9k, 1%
250mA
ON/OFF
6
SHDN
DH
BST
16
14
Si9410
0.1 μ F
D2
EC11FS1
2.5V
0.01 μ F
18V
1/4 W
+5V
AT 3A
1
SS
MAX1652
LX
DL
15
13
Si9410
1N5819
T1
15 μ H
2.2:1
20m ?
220 μ F
10V
220 μ F
10V
0.01 μ F
PGND
12
(OPTIONAL)
4
GND
SYNC
5
3
REF
CSH
CSL
0.33 μ F
8
9
4700pF*
22 ? *
T1 = TRANSPOWER TTI5870
* = OPTIONAL, MAY NOT BE NEEDED
Figure 8. 5V/15V Dual-Output Application Circuit (MAX1652)
______________________________________________________________________________________
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相关代理商/技术参数 |
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| MAX1653EEE-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1653ESE | 功能描述:DC/DC 开关控制器 PWM Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1653ESE+ | 功能描述:DC/DC 开关控制器 PWM Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1653ESE+T | 功能描述:DC/DC 开关控制器 PWM Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1653ESE-T | 功能描述:DC/DC 开关控制器 PWM Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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