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| 型号： | MAX8794ETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC DDR LINEAR REG 10-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 转换器，DDR |
| 输入电压： | 1.1 V ~ 3.6 V |
| 输出数： | 1 |
| 输出电压： | 0.5 V ~ 1.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
Low-Voltage DDR Linear Regulator
Detailed Description
The MAX8794 is a low-voltage, low-dropout DDR termi-
nation linear regulator with an external bias supply
V IN =
1.1V TO 3.6V
IN
OUT
V OUT = V TT = V DDQ / 2
input and a buffered reference output (see Figures 1
and 2). V CC is powered by a 2.7V to 3.6V supply that is
commonly available in laptop and desktop computers.
The 3.3V bias supply drives the gate of the internal
pass transistor, while a lower voltage input at the drain
of the transistor (IN) is regulated to provide V OUT . By
3.3V BIAS
SUPPLY
R3
100k ?
C IN2
10 μ F
C1
1.0 μ F
V CC
MAX8794
PGND
AGND
C OUT1
100 μ F
using separate bias and power inputs, the MAX8794
POWER-GOOD
can drive an n-channel high-side MOSFET and use a
lower input voltage to provide better efficiency.
ON
PGOOD
OUTS
The MAX8794 regulates its output voltage to the volt-
age at REFIN. When used in DDR applications as a ter-
mination supply, the MAX8794 delivers 1.25V or 0.9V at
3A peak (typ) from an input voltage of 1.1V to 3.6V. The
MAX8794 sinks up to 3A peak (typ) as required in a ter-
OFF
V DDQ
R1
10k ?
R2
10k ?
C REFIN
1000pF
SHDN
REFIN
REFOUT
V REFOUT = V TTR
C REFOUT
0.33 μ F
mination supply. The MAX8794 provides shoot-through
protection, ensuring that the source and sink MOSFETs
do not conduct at the same time, yet produces a fast
source-to-sink load transient.
Figure 1. Standard Application Circuit
3.3V BIAS
SUPPLY
V CC
UVLO
EN
SOFT-
START
IN
INPUT
1.1V TO 3.6V
OFF
ON
SHDN
THERMAL
SHDN
V DDQ
REFIN
OUT
V TT
Gm
PGND
V TTR
REFOUT
AGND
REFIN
12k ?
OUTS
PGOOD
POWER-
GOOD
Figure 2. Functional Diagram
DELAY
LOGIC
+150mV
REFIN
-150mV
EN
MAX8794
8 ?
8
_______________________________________________________________________________________
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