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| 型号： | TPS51317RGBR |
| 厂商： | Texas Instruments |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 6A 20VQFN |
| 标准包装： | 3,000 |
| 系列： | D-Cap+™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 2 V |
| 输入电压： | 4.5 V ~ 6.5 V |
| PWM 型： | 混合物 |
| 频率 - 开关： | 800kHz，1MHz，1.2MHz，1.5MHz |
| 电流 - 输出： | 6A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-VQFN（3.5x4.0） |
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SLUSAH9 – MARCH 2011
ELECTRICAL CHARACTERISTICS
over recommended free-air temperature range, V V5IN = 5.0 V, PGND = GND (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY: VOLTAGE, CURRENTS AND 5 V UVLO
I VINSD
VIN shutdown current
EN = ' LO '
0.02
5
μ A
V 5VIN
I 5VIN
I 5VINSD
V V5UVLO
V V5UVHYS
V VREFUVLO
5VIN supply voltage
5VIN supply current
5VIN shutdown current
V5IN UVLO
V5IN UVLO hysteresis
REF UVLO (1)
V5IN voltage range
EN = ’ HI ’ , V5IN supply current
EN = ‘ LO ’ , V5IN shutdown current
Ramp up; EN = ' HI '
Falling hysteresis
Rising edge of VREF, EN = ' HI '
4.5
4.20
5.0
1.1
0.2
4.37
440
1.8
6.5
2
7.0
4.50
V
mA
μ A
V
mV
V
V VREFUVHYS
REF UVLO hysteresis (1)
100
mV
V POR5VFILT
Reset
OVP latch is reset by V5IN falling below the reset threshold
1.5
2.3
3.1
V
VOLTAGE FEEDBACK LOOP: VREF, VOUT, AND VOLTAGE GM AMPLIFIER
V OUTTOL
VOUT accuracy
V REFIN = 1 V, No droop
– 1%
0%
1%
V VREF
I REFSNK
VREF
VREF sink current
I VREF = 0 μ A
I VREF = 50 μ A
V VREF = 2.05 V
1.98
1.975
2.00
2.000
2.5
2.02
2.025
V
mA
G M
Transconductance
1.00
mS
V CM
V DM
I COMPSNK
I COMPSRC
V OFFSET
R DSCH
Common mode input voltage range (1)
Differential mode input voltage
COMP pin maximum sinking current
COMP pin maximum sourcing current
Input offset voltage
Output voltage discharge resistance
V COMP = 2 V, (V REFIN - V OUT ) = 80 mV
V COMP = 2 V
T A = 25 ° C
0
0
80
-80
0
42
2
80
V
mV
μ A
μ A
mV
Ω
f – 3dbVL
– 3dB Frequency (1)
4.5
6.0
7.5
MHz
CURRENT SENSE: CURRENT SENSE AMPLIFIER, OVERCURRENT AND ZERO CROSSING
A CSINT
Internal current sense gain
Gain from the current of the low-side FET to PWM comparator
when PWM = " OFF "
43
53
57
mV/A
I OCL
I OCL(neg)
V ZXOFF
Positive overcurrent limit (valley)
Negative overcurrent limit (valley)
Zero crossing comp internal offset
7.6
– 9.3
0
A
A
mV
DRIVERS: BOOT STRAP SWITCH
R DSONBST
I BSTLK
Internal BST switch on-resistance
Internal BST switch leakage current
I BST = 10 mA, T A = 25 ° C
V BST = 14 V, V SW = 7 V
10
1
Ω
μ A
PROTECTION: OVP, UVP, PGOOD, and THERMAL SHUTDOWN
V PGDLL
V PGHYSHL
V PGDLH
V PGHYSHH
PGOOD deassert to lower
(PGOOD → Low)
PGOOD high hysteresis
PGOOD de-assert to higher
(PGOOD → Low)
PGOOD high hysteresis
Measured at the VOUT pin wrt/ V REFIN
Measured at the VOUT pin wrt/ V REFIN
84%
8%
116%
-8%
V INMINPG
V OVP
V UVP
TH SD
TH SD(hys)
Minimum VIN voltage for valid
PGOOD
OVP threshold
UVP threshold
(1)
Thermal shutdown
Thermal Shutdown hysteresis (1)
Measured at the VIN pin with a 2-mA sink current on PGOOD
pin
Measured at the VOUT pin wrt/ V REFIN
Measured at the VOUT pin wrt/ V REFIN , device latches OFF,
begins soft-stop
Latch off controller, attempt soft-stop.
Controller re-starts after temperature has dropped
0.9
117%
65%
1.3
120%
68%
145
10
1.5
123%
71%
V
° C
° C
(1)
Ensured by design, not production tested.
4
Product Folder Link(s): TPS51317
Copyright ? 2011, Texas Instruments Incorporated
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