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参数资料
| 型号： | MAX1638EAG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC STEP-DWN CTRLR HI-SPD 24-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 应用： | 控制器，Intel Pentium? II |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 1.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 带卷 (TR) |
High-Speed Step-Down Controller with
Synchronous Rectification for CPU Power
ABSOLUTE MAXIMUM RATINGS
V DD , V CC , PWROK to AGND ......................................-0.3V to 6V
PGND to AGND ..................................................................±0.3V
CSH, CSL to AGND ....................................-0.3V to (V CC + 0.3V)
NDRV, PDRV, DL to PGND.........................-0.3V to (V DD + 0.3V)
REF, CC1, CC2, LG, D0–D4, FREQ,
FB to AGND.............................................-0.3V to (V CC + 0.3V)
BST to PGND ............................................................-0.3V to 12V
BST to LX ....................................................................-0.3V to 6V
Continuous Power Dissipation (T A = +70°C)
QSOP (derate 8.70mW/°C above +70°C) .....................696mW
QSOP θ JC ..................................................................40°C/W
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
SSOP θ JC ..................................................................45°C/W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
DH to LX.............................................(LX - 0.3V) to (BST + 0.3V)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V DD = V CC = D4 = +5V, PGND = AGND = D0–D3 = 0V, FREQ = REF, T A = 0°C to +85°C , unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (FB) Accuracy
Input Voltage Range
Over line and load
(Note 1)
V CC = V DD
T A = +25°C to +85°C
T A = 0°C to +85°C
4.5
±1
±1.5
5.5
%
V
Input Undervoltage Lockout
V CC rising edge, 1% hysteresis
FB overdrive = 200mV
Operating
4.0
4.2
2.5
V
V CC Supply Current
V CC = V DD
= 5.5V
mode
Shutdown
FB overdrive = 0V
DAC code = 11111
5
0.3
mA
mode
V REF = 0V
3.6
10
V DD Supply Current
V CC = V DD = 5.5V, FB forced 200mV above
regulation point, operating or standby mode
0.1
mA
Reference Voltage
Reference Load Regulation
Reference Undervoltage Lockout
Reference Short-Circuit Current
No load
0μA < I REF < 100μA
Rising edge, 1% hysteresis
V REF = 0V
3.465
2.7
0.5
3.5
3.535
10
3.0
4.0
V
mV
V
mA
LG = GND
0.5
AC Load Regulation
(Note 2)
CSH - CSL =
0mV to 80mV
LG = REF
1
%
LG = V CC
LG = GND
2
0.05
DC Load Regulation
(Note 2)
CSH - CSL =
0mV to 80mV
LG = REF
0.1
%
LG = V CC
0.2
PWROK Trip Level
PWROK Output Voltage Low
PWROK Output Current High
Switching Frequency
Rising FB, 1% hysteresis with respect to V REF
Falling FB, 1% hysteresis with respect to V REF
I SINK = 2mA, V CC = 4.5V
PWROK = 5.5V
FREQ = V CC
FREQ = REF
FREQ = AGND
-7.5
6.5
850
540
255
-6
8
1000
600
300
-4.5
9.5
0.4
1
1150
660
345
%
V
μA
kHz
2
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