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参数资料
| 型号： | MAX17499BEUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST ISO PWM 10-UMAX |
| 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 |
| 输出数： | 1 |
| 频率 - 最大： | 625kHz |
| 占空比： | 75% |
| 电源电压： | 9.5 V ~ 24 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
Current-Mode PWM Controllers with
Programmable Switching Frequency
Typical Operating Characteristics (continued)
(V UVLO/EN = +1.4V, V FB = +1V, COMP = open, V CS = 0V, T A = +25°C, unless otherwise noted.)
NDRV HIGH-OUTPUT IMPEDANCE
ERROR AMPLIFIER OPEN-LOOP GAIN
5.0
vs. TEMPERATURE
SOURCING 20mA
100
AND PHASE vs. FREQUENCY
MAX17499/500 toc22
120
80
80
4.6
60
40
4.2
3.8
40
20
0
-20
GAIN
PHASE
0
-40
-80
-120
3.4
-40
-160
3.0
-40
-15
10
35
60
85
-60
0.1
1
10 100
-200
1k 10k 100k 1M 10M 100M
TEMPERATURE ( ° C)
FREQUENCY (Hz)
Pin Configuration
TOP VIEW
UVLO/EN 1
+
10 IN
UFLG
2
9
V CC
FB
COMP
CS
3
4
5
MAX17499
MAX17500
8
7
6
NDRV
GND
RT
μ MAX
Pin Description
PIN
NAME
FUNCTION
Externally Programmable Undervoltage Lockout. UVLO/EN programs the input start voltage. Connect
1
UVLO/EN UVLO/EN to GND to disable the device. NDRV stops switching approximately 210μs after the UVLO/EN
voltage falls below 1.17V.
2
3
4
5
6
UFLG
FB
COMP
CS
RT
Open-Drain Undervoltage Flag Output. UFLG is asserted low as soon as the UVLO/EN voltage falls below its
threshold.
Error-Amplifier Inverting Input
Error-Amplifier Output
Current-Sense Input. Current-sense connection for PWM regulation and cycle-by-cycle current limit.
Connect to the high side of the sense resistor. An RC filter may be necessary to eliminate leading-edge
spikes. Current-limit trip voltage is 1V.
Oscillator Timing Resistor Input. An RC network may be required to reduce jitter (see the Typical Application
Circuit ).
_______________________________________________________________________________________
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