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| 型号： | MAX8632ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/29页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY DDR 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，DDR |
| 输入电压： | 2 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 1.8V，2.5V，0.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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Integrated DDR Power-Supply Solution for
Desktops, Notebooks, and Graphic Cards
ABSOLUTE MAXIMUM RATINGS
V IN to GND .............................................................-0.3V to +30V
V DD, AV DD , VTTI to GND .........................................-0.3V to +6V
SHDN , REFIN to GND ..............................................-0.3V to +6V
SS, POK1, POK2, SKIP , ILIM, FB to GND ................-0.3V to +6V
STBY , TON, REF, UVP/OVP to GND ........-0.3V to (AV DD + 0.3V)
OUT, VTTR to GND ..................................-0.3V to (AV DD + 0.3V)
DL to PGND1..............................................-0.3V to (V DD + 0.3V)
DH to LX ....................................................-0.3V to (V BST + 0.3V)
LX to BST..................................................................-6V to +0.3V
LX to GND .................................................................-2V to +30V
VTTS to GND............................................-0.3V to (AV DD + 0.3V)
PGND1, PGND2, TP0 to GND ...............................-0.3V to +0.3V
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (T A = +70°C)
28-Pin 5mm x 5mm Thin QFN (derate 35.7mW/°C
above +70°C).................................................................2.86W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
VTT to GND...............................................-0.3V to (V VTTI + 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 IN = +15V, V DD = AV DD = V SHDN = STBY = V BST = V ILIM = 5V, V OUT = V REFIN = V VTTI = 2.5V, UVP/OVP = TP0 = FB = SKIP
= GND, PGND1 = PGND2 = LX = GND, TON = OPEN, V VTTS = V VTT , T A = -40°C to +85°C, unless otherwise noted. Typical values
are at T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAIN PWM CONTROLLER
Input Voltage Range
Output Adjust Range
V IN
V DD , AV DD
V OUT
FB = OUT
2
4.5
0.7
0.693
0.7
28
5.5
5.5
0.707
V
V
Output Voltage Accuracy
(Note 2)
Soft-Start Ramp Time
t SS
FB = GND
FB = V DD
Rising edge of SHDN to full current limit
TON = GND (600kHz)
2.47
1.78
170
2.5
1.8
1.7
194
2.53
1.82
219
V
ms
On-Time
t ON
V IN = 15V,
V OUT = 1.5V
(Note 3)
TON = REF (450kHz)
TON = open (300kHz)
213
316
243
352
273
389
ns
TON = AV DD (200kHz)
461
516
571
Minimum Off-Time
t OFF_MIN
(Note 3)
200
300
450
ns
V IN Quiescent Supply Current
V IN Shutdown Supply Current
I IN
SHDN = GND
25
1
40
5
μA
μA
AV DD Quiescent Supply Current
AV DD + V DD Shutdown Supply
Current
I AVDD
All on (PWM, VTT, and VTTR on)
STBY = GND (only VTTR and PWM on)
SHDN = GND
2.5
1
5
2
20
mA
μA
AV DD Undervoltage-Lockout
Threshold
Rising edge of V IN
Hysteresis
4.05
4.25
50
4.40
V
mV
V DD Quiescent Supply Current
I VDD
Set V FB = 0.8V
1
5
μA
2
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