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參數(shù)資料
| 型號： | MAX1638EEG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 中文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-24 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 149K |
| 代理商： | MAX1638EEG |
M
High-S peed S tep-Down Controller with
S ync hronous Rec tific ation for CPU Power
2
_______________________________________________________________________________________
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
DH to LX.............................................(LX - 0.3V) to (BST + 0.3V)
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.)
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.
Continuous Power Dissipation (T
A
= +70°C)
QSOP (derate 8.70mW/°C above +70°C).....................696mW
QSOP
θ
J C
..................................................................40°C/W
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
SSOP
θ
J C
..................................................................45°C/W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
FREQ = AGND
FREQ = REF
V
CC
= V
DD
V
CC
rising edge, 1% hysteresis
FREQ = V
CC
PWROK = 5.5V
Over line and load
(Note 1)
I
SINK
= 2mA, V
CC
= 4.5V
Falling FB, 1% hysteresis with respect to V
REF
Rising FB, 1% hysteresis with respect to V
REF
CSH - CSL =
0mV to 80mV
0μA < I
REF
< 100μA
Rising edge, 1% hysteresis
No load
V
CC
= V
DD
= 5.5V, FB forced 200mV above
regulation point, operating or standby mode
V
REF
= 0V
CONDITIONS
kHz
255
300
345
Switching Frequency
540
600
660
850
1000
1150
μA
1
PWROK Output Current High
V
0.4
PWROK Output Voltage Low
%
6.5
8
9.5
PWROK Trip Level
-7.5
-6
-4.5
%
2
AC Load Regulation
(Note 2)
1
0.5
mA
0.5
4.0
Reference Short-Circuit Current
V
2.7
3.0
Reference Undervoltage Lockout
V
V
4.5
4.0
5.5
4.2
2.5
Input Voltage Range
Input Undervoltage Lockout
%
±1.5
±1
Output Voltage (FB) Accuracy
mV
10
Reference Load Regulation
V
3.465
3.5
3.535
Reference Voltage
mA
0.1
V
DD
Supply Current
UNITS
MIN
TYP
MAX
PARAMETER
CSH - CSL =
0mV to 80mV
%
0.2
DC Load Regulation
(Note 2)
0.1
0.05
T
A
= +25°C to +85°C
T
A
= 0°C to +85°C
LG = GND
LG = REF
LG = V
CC
LG = GND
LG = REF
LG = V
CC
FB overdrive = 200mV
FB overdrive = 0V
DAC code = 11111
5
Operating
mode
V
CC
= V
DD
= 5.5V
mA
3.6
10
V
CC
Supply Current
V
REF
= 0V
Shutdown
mode
0.3
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