Datasheet > 电源电路 > 开关式稳压器或控制器> TPS62000YEGR

TPS62000YEGR

更新时间： 2024-02-14 10:27:11

品牌	Logo	应用领域
德州仪器 - TI		转换器稳压器开关式稳压器或控制器电源电路开关式控制器功效 DC-DC转换器
页数	文件大小	规格书
25页	469K
描述
HIGH-EFFICIENCY STEP-DOWN LOW POWER DC-DC CONVERTER

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技术参数
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TPS62000YEGR 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, BGA12,3X4,20	针数：	12
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.72
其他特性：	PFM CONTROL TECHNIQUE IS ALSO POSSIBLE	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	5.5 V	最小输入电压：	2 V
标称输入电压：	3.6 V	JESD-30 代码：	R-XBGA-B12
长度：	2.25 mm	功能数量：	1
端子数量：	12	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	1.6 A
封装主体材料：	UNSPECIFIED	封装代码：	VFBGA
封装等效代码：	BGA12,3X4,20	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）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	0.625 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：	1000 kHz
技术：	MOS	温度等级：	INDUSTRIAL
端子形式：	BALL	端子节距：	0.5 mm
端子位置：	BOTTOM	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	1.75 mm	Base Number Matches：	1

TPS62000YEGR 数据手册

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SLVS294C − SEPTEMBER 2000 − REVISED SEPTEMBER 2003

operation (continued)

In the PFM mode, the converter operates with:

Variable frequency

Constant peak current that reduces switching losses

Quiescent current at a minimum

Thus maintaining the highest efficiency at light load currents. In this mode, the output voltage is monitored with

the error amplifier. As soon as the output voltage falls below the nominal value, the high side switch is turned

on and the inductor current ramps up. When the inductor current reaches the peak current of typical: 150 mA

+ 50 mA/V x (V − V ), the high side switch turns off and the low side switch turns on. As the inductor current

ramps down, the low side switch is turned off before the inductor current becomes negative which completes

the cycle. When the output voltage falls below the nominal voltage again, the next cycle is started.

The converter enters the PWM mode again as soon as the output voltage can not be maintained with the typical

peak inductor current in the PFM mode.

The control loop is internally compensated reducing the amount of external components.

The switch current is internally sensed and the maximum current limit can be set to typical 600 mA by connecting

ILIM to ground or to typically 1.2 A connecting ILIM to V .

100% duty cycle operation

As the input voltage approaches the output voltage and the duty cycle exceeds typical 95%, the converter turns

the P-channel high side switch continuously on. In this mode, the output voltage is equal to the input voltage

minus the voltage drop across the P-channel MOSFET.

synchronization, power save mode and forced PWM mode

If no clock signal is applied, the converter operates with a typical switching frequency of 750 kHz. It is possible

to synchronize the converter to an external clock within a frequency range from 500 kHz to 1000 kHz. The device

automatically detects the rising edge of the first clock and is synchronizes immediately to the external clock.

If the clock signal is stopped, the converter automatically switches back to the internal clock and continues

operation without interruption. The switch over is initiated if no rising edge on the SYNC pin is detected for a

duration of four clock cycles. Therefore, the maximum delay time can be 8 µs in case the internal clock has a

minimum frequency of 500 kHz.

In case the device is synchronized to an external clock, the power save mode is disabled and the device stays

in forced PWM mode.

Connecting the SYNC pin to the GND pin enables the power save mode. The converter operates in the PWM

mode at moderate to heavy loads and in the PFM mode during light loads maintaining high efficiency over a

wide load current range.

Connecting the SYNC pin to the V pin forces the converter to operate permanently in the PWM mode even

at light or no load currents. The advantage is the converter operates with a fixed switching frequency that allows

simple filtering of the switching frequency for noise sensitive applications. In this mode, the efficiency is lower

compared to the power save mode during light loads (see Figure 1).

It is possible to switch from forced PWM mode to the power save mode during operation.

The flexible configuration of the SYNC pin during operation of the device allows efficient power management

by adjusting the operation of the TPS6200x to the specific system requirements.

low noise antiringing switch

An antiringing switch is implemented in order to reduce the EMI radiated from the converter during

discontinuous conduction mode (DCM). In DCM, the inductor current ramps to zero before the end of each

switching period. The internal load comparator turns off the low side switch at that instant thus preventing the

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

1 2 3 456 7 8...25

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