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参数资料
| 型号： | MAX17510ATB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC REG DDR LOW VOLTAGE 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 ~ 125°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 Regulators
The MAX1510/MAX17510 feature an open-drain
PGOOD output that transitions high 2ms after the out-
put initially reaches regulation. PGOOD goes low within
10μs of when the output goes out of regulation by
± 150mV. The MAX1510/MAX17510 feature current- and
thermal-limiting circuitry to prevent damage during fault
conditions.
3.3V Bias Supply (V CC )
The V CC input powers the control circuitry and provides
the gate drive to the pass transistor. This improves effi-
ciency by allowing V IN to be powered from a lower sup-
ply voltage. Power V CC from a well-regulated 3.3V
supply. Current drawn from the V CC supply remains rel-
atively constant with variations in V IN and load current.
Bypass V CC with a 1μF or greater ceramic capacitor as
close to the device as possible.
V CC Undervoltage Lockout (UVLO)
The V CC input undervoltage-lockout (UVLO) circuitry
ensures that the regulator starts up with adequate volt-
age for the gate-drive circuitry to bias the internal pass
transistor. The UVLO threshold is 2.55V (typ). V CC must
remain above this level for proper operation.
Power-Supply Input (IN)
IN provides the source current for the linear regulator’s
output, OUT. IN connects to the drain of the internal n-
connected to ceramic bypass capacitors (0.33μF to
1.0μF). REFOUT is active when V REFIN > 0.45V and
V CC is above V UVLO . REFOUT is independent of
SHDN .
Shutdown
Drive SHDN low to disable the error amplifier, gate-
drive circuitry, and pass transistor (Figure 2). In shut-
down, OUT is terminated to GND with an 8 Ω MOSFET.
REFOUT is independent of SHDN . Connect SHDN to
V CC for normal operation.
Current Limit
The MAX1510/MAX17510 feature source and sink cur-
rent limits to protect the internal n-channel MOSFETs.
The source and sink MOSFETs have a typical 3A cur-
rent limit (1.8A min). This current limit prevents damage
to the internal power transistors, but the device can
enter thermal shutdown if the power dissipation
increases the die temperature above +165 ° C (see the
Thermal-Overload Protection section).
Soft-Start Current Limit
Soft-start gradually increases the internal source cur-
rent limit to reduce input surge currents at startup. Full-
source current limit is available after the 200μs soft-start
timer has expired. The soft-start current limit is
given by:
I LIMIT ( SS ) = LIMIT
channel power MOSFET. IN can be as low as 1.1V,
minimizing power dissipation. The input UVLO prohibits
operation below 0.8V (typ). Bypass IN with a 10μF or
I
t SS
× t
greater capacitor as close to the device as possible.
Reference Input (REFIN)
The MAX1510/MAX17510 regulate OUTS to the voltage
set at REFIN, making the MAX1510/MAX17510 ideal for
memory applications where the termination supply must
track the supply voltage. Typically, REFIN is set by an
external resistive voltage-divider connected to the
memory supply (V DDQ ) as shown in Figure 1.
The maximum output voltage of 1.5V is limited by the
gate-drive voltage of the internal n-channel power
transistor.
Buffered Reference Output (REFOUT)
REFOUT is a unity-gain transconductance amplifier that
generates the DDR reference supply. It sources and
sinks greater than 5mA. The reference buffer is typically
where I LIMIT and t SS are from the Electrical
Characteristics.
Thermal-Overload Protection
Thermal-overload protection prevents the linear regula-
tor from overheating. When the junction temperature
exceeds +165°C, the linear regulator and reference
buffer are disabled, allowing the device to cool. Normal
operation resumes once the junction temperature cools
by 15 ° C. Continuous short-circuit conditions result in a
pulsed output until the overload is removed. A continu-
ous thermal-overload condition results in a pulsed out-
put. For continuous operation, do not exceed the
absolute maximum junction-temperature rating
of +150°C.
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