米6体育平台手机版

ZHCSG38A March 2017 – November 2022 TPS65263-1Q1

PRODUCTION DATA

封装选项

机械数据 (封装 | 引脚)

RHB|32
- MPQF130D

散热焊盘机械数据 (封装 | 引脚)

RHB|32
- QFND029X

订购信息

7.3.1 Adjusting the Output Voltage

The output voltage of each buck is set with a resistor divider from the output of buck to the FB pin. TI recommends to use 1% tolerance or better resistors.

Figure 7-1 Voltage Divider Circuit

Equation 1.

To improve efficiency at light loads consider using larger value resistors. If the values are too high, the regulator is more sensitive to noise. Table 7-1 shows the recommended resistor values.

Table 7-1 Output Resistor Divider Selection

OUTPUT VOLTAGE (V)	R1 (kΩ)	R2 (kΩ)
1	10	15
1.2	10	10
1.5	15	10
1.8	20	10
2.5	31.6	10
3.3	45.3	10
3.3	22.6	4.99
5	73.2	10
5	36.5	4.99

The output voltage of the buck converter can be dynamically scaled by I²C-controlled 7-bit register, VOUTx_SEL. Before I²C communication, the output voltage is set with the resistor divider from the output of buck to the FB pin. When the GO bit is set to 1 through the I²C interface, the buck converter switches the external resistor divider to the internal resistor divider as shown in Figure 7-2. The output voltage can be selected among 128 voltages with voltage identifications (VID) shown in Table 7-2. The output voltage range of dynamic voltage scaling is 0.68 to 1.95 V with 10-mV resolution of each voltage step.

Figure 7-2 Voltage Divider Circuit

Table 7-2 V_OUT Output Voltage Setting

OUT_SEL <7:0>	V_OUT (V)	VOUT_SEL <7:0>	V_OUT (V)	VOUT_SEL <7:0>	V_OUT (V)	VOUT_SEL <7:0>	V_OUT (V)
0	0.68	20	1	40	1.32	60	1.64
1	0.69	21	1.01	41	1.33	61	1.65
2	0.7	22	1.02	42	1.34	62	1.66
3	0.71	23	1.03	43	1.35	63	1.67
4	0.72	24	1.04	44	1.36	64	1.68
5	0.73	25	1.05	45	1.37	65	1.69
6	0.74	26	1.06	46	1.38	66	1.7
7	0.75	27	1.07	47	1.39	67	1.71
8	0.76	28	1.08	48	1.4	68	1.72
9	0.77	29	1.09	49	1.41	69	1.73
A	0.78	2A	1.1	4A	1.42	6A	1.74
B	0.79	2B	1.11	4B	1.43	6B	1.75
C	0.8	2C	1.12	4C	1.44	6C	1.76
D	0.81	2D	1.13	4D	1.45	6D	1.77
E	0.82	2E	1.14	4E	1.46	6E	1.78
F	0.83	2F	1.15	4F	1.47	6F	1.79
10	0.84	30	1.16	50	1.48	70	1.8
11	0.85	31	1.17	51	1.49	71	1.81
12	0.86	32	1.18	52	1.5	72	1.82
13	0.87	33	1.19	53	1.51	73	1.83
14	0.88	34	1.2	54	1.52	74	1.84
15	0.89	35	1.21	55	1.53	75	1.85
16	0.9	36	1.22	56	1.54	76	1.86
17	0.91	37	1.23	57	1.55	77	1.87
18	0.92	38	1.24	58	1.56	78	1.88
19	0.93	39	1.25	59	1.57	79	1.89
1A	0.94	3A	1.26	5A	1.58	7A	1.9
1B	0.95	3B	1.27	5B	1.59	7B	1.91
1C	0.96	3C	1.28	5C	1.6	7C	1.92
1D	0.97	3D	1.29	5D	1.61	7D	1.93
1E	0.98	3E	1.3	5E	1.62	7E	1.94
1F	0.99	3F	1.31	5F	1.63	7F	1.95