ZHCSD91B 数据表 | 德州仪器 TI.com.cn

ZHCSD91B January 2015 – January 2022 TPS65251-1 , TPS65251-2 , TPS65251-3

PRODUCTION DATA

封装选项

机械数据 (封装 | 引脚)

RHA|40
- MPQF135D

散热焊盘机械数据 (封装 | 引脚)

RHA|40
- QFND227K

订购信息

8.2.3 Application Curves

Figure 8-3 Buck 1 Start-Up (Ch3 = V_IN)

Figure 8-5 Buck 1 Start-Up 1.5-A Resistive

Figure 8-7 Buck 1 Switching Node, No Load

Figure 8-9 Buck 1 Switching Node, 2-A Load

Figure 8-11 Buck 1 Dynamic Response, 0- to 1-A Step

Figure 8-13 Buck 1 Dynamic Response, 1-A to 3-A Step

Figure 8-15 Buck 1 Ripple, 2-A Load

Ch1 = V_OUT	Ch2 = COMP1	Ch3 = I_OUT
Ch4 = Inductor

Figure 8-17 Buck 1 Current Limit Operation With Slow Rising Output Current, Trip at 4 A

Figure 8-19 Buck 1 Low-Power Output, No Load

Ch1 = V_OUT	Ch3 = I_OUT	Ch4 = Inductor

Figure 8-21 Buck 1 PFM to PWM Transition

Ch3 = V_IN

Figure 8-23 Buck 2 Start-Up, No Load

Figure 8-25 Buck 2 Switching Node, No Load

Figure 8-27 Buck 2 Switching Node, 2-A Load

Figure 8-29 Buck 2 Dynamic Response, 1-A to 2-A Step

Figure 8-31 Buck 2 Ripple, 1-A Load

Figure 8-33 Buck 2 Low-Power Output, No Load

Ch1 = V_OUT	Ch3 = I_OUT	Ch4 = Inductor

Figure 8-35 Buck 2 PWM to PFM Transition

Ch3 = V_IN

Figure 8-37 Buck 3 Start-Up

Figure 8-39 Buck 3 Switching Node, No Load

Figure 8-41 Buck 3 Switching Node, 1.5-A Load

Figure 8-43 Buck 3 Dynamic Response, 1-A to 1.5-A Step

Figure 8-45 Buck 3 Ripple, 1-A Load

Figure 8-47 Buck 3 Low-Power Output, No Load

Ch1 = V_OUT	Ch3 = I_OUT	Ch4 = Inductor

Figure 8-49 Buck 3 PWM to PFM Transition

Figure 8-51 Temperature Profile, V_O = 1.2 V, I_O = 3 A, V_O = 1.8 V, I_O = 2 A, V_O = 3.3 V, I_O = 2 A, T_A = 28°C

Figure 8-4 Buck 1 Soft-Start

Figure 8-6 Buck 1 Soft-Start 2-A Load

Figure 8-8 Buck 1 Switching Node, 1-A Load

Figure 8-10 Buck 1 Switching Node, 3-A Load

Figure 8-12 Buck 1 Dynamic Response, 2-A to 3-A Step

Figure 8-14 Buck 1 Ripple, 1-A Load

Figure 8-16 Buck 1 Ripple, 3-A Load

Ch1 = V_OUT	Ch2 = COMP1	Ch3 = I_OUT
Ch4 = Inductor

Figure 8-18 Buck 1 Current Limit Operation, Hiccup

Figure 8-20 Buck 1 Low-Power Operation

Ch1 = V_OUT	Ch3 = I_OUT	Ch4 = Inductor

Figure 8-22 Buck 1 PWM to PFM Transition

Figure 8-24 Buck 2 Start-Up, 2-A Load

Figure 8-26 Buck 2 Switching Node, 1-A Load

Figure 8-28 Buck 2 Dynamic Response, 0-A to 1-A Step

Figure 8-30 Buck 2 Ripple, No Load

Figure 8-32 Buck 2 Ripple, 3-A Load

Ch1 = V_OUT	Ch3 = I_OUT	Ch4 = Inductor

Figure 8-34 Buck 2 PFM to PWM Transition

Ch1 = V_OUT	Ch2 = COMP1	Ch3 = I_OUT
Ch4 = Inductor

Figure 8-36 Buck 2 Current Limit Operation

Figure 8-38 Buck 3 Soft-Start

Figure 8-40 Buck 3 Switching Node, 1-A Load

Figure 8-42 Buck 3 Dynamic Response, 0-A to 1-A Step

Figure 8-44 Buck 3 Ripple, No Load

Figure 8-46 Buck 3 Ripple, 3-A Load

Ch1 = V_OUT	Ch3 = I_OUT	Ch4 = Inductor

Figure 8-48 Buck 3 PFM to PWM Transition

Ch1 = V_OUT	Ch2 = COMP1	Ch3 = I_OUT
Ch4 = Inductor

Figure 8-50 Buck 3 Current Limit Operation