Datasheet > ADP2121ACBZ-1.85R7

ADP2121ACBZ-1.85R7

更新时间： 2024-02-23 07:09:03

品牌	Logo	应用领域
亚德诺 - ADI		开关
页数	文件大小	规格书
21页	2380K
描述
600 mA, 6 MHz Synchronous Step-Down DC-to-DC Converter

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ADP2121ACBZ-1.85R7 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	BGA
包装说明：	VFBGA, BGA6,2X3,16	针数：	6
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.65
其他特性：	ALSO HAS CONTROL TECHNIQUE OF PFM	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	5.5 V	最小输入电压：	2.3 V
标称输入电压：	3.6 V	JESD-30 代码：	R-PBGA-B6
JESD-609代码：	e3	长度：	1.3 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	6	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	1.222 A
标称输出电压：	1.85 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	VFBGA	封装等效代码：	BGA6,2X3,16
封装形状：	RECTANGULAR	封装形式：	GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	225	认证状态：	Not Qualified
座面最大高度：	0.66 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	BUCK
最大切换频率：	6640 kHz	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	BALL
端子节距：	0.4 mm	端子位置：	BOTTOM
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	0.9 mm
Base Number Matches：	1

ADP2121ACBZ-1.85R7 数据手册

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ADP2121

Data Sheet

delays in the current-limit comparator allow a slight increase and

variation in this specification.

Output Short-Circuit Protection

If the output voltage is inadvertently shorted to GND, a standard

dc-to-dc controller delivers maximum power into that short.

This may result in a potentially catastrophic failure. To prevent

this, the ADP2121 senses when the output voltage is below the

short-circuit protection threshold (typically 1.24 V).

Soft Start

To prevent excessive input inrush current at startup, the ADP2121

operates with an internal soft start. When EN goes high, or when

the part recovers from a fault (UVLO, TSD, or short-circuit

protection), a soft start timer begins. The soft start timer cor-

responds to the maximum soft start period for the given fixed

output voltage. During this time, the peak current limit is gradually

increased to its maximum. As seen in Figure 40 through Figure 45,

the output voltage passes through several stages to ensure that the

converter is able to start up effectively and in proper sequence.

After the soft start period has expired, the peak current limit

remains at 1 A (typical), and the part enters the operating mode

determined by the MODE pin.

At this point, the controller turns off for approximately 1.8 ms

(V_OUT= 1.82 V), 0.44 ms (V_OUT= 1.8 V and 1.85 V), or 0.48 ms

(V_OUT= 2.3 V), and then automatically initiates a soft start

sequence. This cycle repeats until the short is removed or the

part is disabled. This dramatically reduces the power delivered

into the short circuit, yet still allows the converter to recover if

the fault is removed.

OUTPUT VOLTAGE (200mV/DIV)

Synchronous Rectification

In addition to the P-channel MOSFET switch, the ADP2121

includes an N-channel MOSFET switch to build the synchronous

rectifier. The synchronous rectifier improves efficiency, especially

for small load currents, and reduces cost and board space by

eliminating the need for an external rectifier.

Compensation

The control loop is internally compensated to deliver maxi-

mum performance with no additional external components.

The ADP2121 is designed to work with 0.47 μH chip inductors

and 4.7 μF capacitors (see Table 6, Table 7, and Table 8.) Other

values may reduce performance and/or stability.

INDUCTOR CURRENT (500mA/DIV)

TIME (1ms/DIV)

Figure 55. Output Short-Circuit Protection, V_OUT= 1.82 V

Thermal Shutdown (TSD) Protection

Undervoltage Lockout (UVLO)

The ADP2121 also includes TSD protection. If the die

temperature exceeds 150°C (typical), the TSD protection

activates and turns off the power devices. They remain off

until the die temperature falls below 135°C (typical), at

which point the converter restarts.

If the input voltage is below the UVLO threshold, the ADP2121

automatically turns off the power switches and places the part

into a low power consumption mode. This prevents potentially

erratic operation at low input voltages. The UVLO levels have

approximately 100 mV of hysteresis to ensure glitch-free startup.

Rev. C | Page 16 of 20

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与ADP2121ACBZ-1.85R7相关器件

型号	品牌	获取价格	描述	数据表
ADP2121ACBZ-1.8-R7	ADI	获取价格	600 mA, 6 MHz Synchronous Step-Down DC-to-DC Converter
ADP2121ACBZ-1875R7	ROCHESTER	获取价格	1.222 A SWITCHING REGULATOR, 6640 kHz SWITCHING FREQ-MAX, PBGA6, 1.17 MM HEIGHT, 0.40 MM P
ADP2121ACBZ-1875R7	ADI	获取价格	600 mA, 6 MHz Synchronous Step-Down DC-to-DC Converter
ADP2125BCDZ-1.26R7	ROCHESTER	获取价格	SWITCHING REGULATOR, 6000 kHz SWITCHING FREQ-MAX, PBGA6, 0.405 MM HEIGHT, ROHS COMPLIANT,
ADP2126	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2126-1.2-EVALZ	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2126ACDZ-1.20R7	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127-1.26-EVALZ	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127ACNZ-1.20R7	ADI	获取价格	暂无描述

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