參數(shù)資料
型號： MAX1638EAG
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： High-Speed Step-Down Controller with Synchronous Rectification for CPU Power
中文描述： SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO24
封裝： SSOP-24
文件頁數(shù)： 4/16頁
文件大?。?/td> 149K
代理商： MAX1638EAG
V
M
High-S peed S tep-Down Controller with
S ync hronous Rec tific ation for CPU Power
4
_______________________________________________________________________________________
FREQ = REF
FREQ = AGND
FREQ = V
CC
FREQ = V
CC
Falling FB, 1% hysteresis with respect to V
REF
Rising FB, 1% hysteresis with respect to V
REF
Over line and load (Note 1)
V
CC
= V
DD
V
CC
rising edge, 1% hysteresis
CONDITIONS
510
240
84
600
300
90
690
360
800
1000
1200
Switching Frequency
6
8
10
kHz
%
-8
-6
-4
PWROK Trip Level
%
±2.5
Output Voltage (FB) Accuracy
V
V
4.5
3.9
5.5
4.3
3
Input Voltage Range
Input Undervoltage Lockout
UNITS
MIN
TYP
MAX
PARAMETER
BST - LX = 4.5V
V
DD
= 4.5V
FB = 3.5V
mV
0.7
0.7
100
2
2
%
Maximum Duty Cycle
DH On-Resistance
DL On-Resistance
Current-Limit Trip Voltage
70
130
ELECTRICAL CHARACTERISTICS
(V
DD
= V
CC
= D4 = +5V, PGND = AGND = D0–D3= 0V, FREQ = REF,
T
A
= -40°C to +85°C
, unless otherwise noted.) (Note 3)
Note 1:
FB accuracy is 100% tested at FB = 3.5V (code 10000) with V
CC
= V
DD
= 4.5V to 5.5V and CSH - CSL = 0mV to 80mV. The
other DAC codes are tested with V
CC
= V
DD
= 5V and CSH - CSL = 0.
Note 2:
AC load regulation sets the AC loop gain, to make tradeoffs between output filter capacitor size and transient response,
and has only a slight effect on DC accuracy or DC load-regulation error.
Note 3:
Specifications from 0°C to -40°C are guaranteed by design, not production tested.
No load
V
3.448
3.5
3.553
Reference Voltage
0.4
12
Operating mode
V
CC
Supply Current
V
CC
= V
DD
= 5.5V, FB forced 200mV above
regulation point, operating or shutdown mode
mA
0.2
V
CC
= V
DD
= 5.5V,
FB overdrive =
200mV
V
DD
Supply Current
mA
Shutdown
mode
V
REF
= 0V
DAC code = 11111
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相關代理商/技術參數(shù)
參數(shù)描述
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