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參數資料
| 型號： | TPS51511RHLT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, QFN-20 |
| 文件頁數： | 26/29頁 |
| 文件大小： | 1019K |
| 代理商： | TPS51511RHLT |
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DEVICE INFORMATION
NC
GND
ODOFF
OD
VLDO
VLDOFB
PGOOD
VOSW
CS
ENSW
V5IN
PGND
LL
DRVL
DRVH
C
O
M
P
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TPS51511
COMP
VLDOIN
VBST
ENLDO
VSWFB
SLVS735A – FEBRUARY 2007 – REVISED APRIL 2007
TOP VIEW
RHL PACKAGE
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
VLDOIN
1
I
Input terminal of the LDO.
NC
2
–
Pin not used. No internal connection.
VLDO
3
O
Output terminal of the LDO. When LDO is turned off, the output capacitor is discharged by an internal FET.
VLDOFB
4
I
Feedback pin of the LDO. A voltage divider sets the LDO output voltage.
GND
5
–
Signal ground. Connect to negative terminal of the LDO output capacitor.
A comparator input. When this pin is tied to VLDOFB, OD acts as a PGOOD signal for the LDO. When
ODOFF
6
I
connected to external logic, OD acts like a switch. See Table 1 for detailed information.
OD
7
I/O
The output of the multifuntional open-drain switch.
Output of the transconductance amplifier for phase compensation in current mode. Connect to V5IN to disable
COMP
8
I/O
Gm amplifier and enable D-CAP mode.
VOSW
9
I/O
Switcher output voltage monitor. Input for on-time one-shot timer and advanced PGOOD masking comparator.
Feedback pin of the switcher. A voltage divider connected to this pin sets the switcher output voltage. A resistor
connected between this pin and OD pin can be inserted in parallel with the low-side resistor of the voltage
VSWFB
10
I
divider, according to the ODOFF input, to establish the dynamic voltage step. This terminal is also the input for
the OVP, UVP and PGOOD comparators.
ENLDO
11
I
LDO-enable signal input.
ENSW
12
I
Switcher-enable signal input.
Power-good signal open-drain output. Pulled low when VSWFB voltage falls outside the target window
PGOOD
13
O
comparator. The upper side of the window comparator will be masked if the VOSW volttage is lower than 1.36 V
(typ.). Refer to the Advance PGOOD Mask section for details.
5V Power supply input. This 5 V supplies internal control circuitry, LDO pass FET gate drive, VDRVH and
V5IN
14
I
VDRVL gate drivers.
Current-sense comparator input (–) for resistor current-sense mode. If connected to 5VIN through a
CS
15
I/O
voltage-setting resistor, constant current sinks through this pin to set the OCL point for the RDS(ON)
current-sense mode.
PGND
16
I/O
Ground for bottom MOSFET gate driver. Also current-sense comparator input (+).
DRVL
17
O
Rectifying (bottom) MOSFET gate-drive output.
LL
18
I/O
Switching (top) MOSFET gate driver return. Current sense comparator input (–) for RDS(ON) current-sense mode.
DRVH
19
O
Switching (top) MOSFET gate drive output
VBST
20
I/O
Switching (top) MOSFET driver bootstrap voltage input. Internally connected to V5IN through an PN diode.
6
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| TPS51511RHLTG4 | 功能描述:DC/DC 開關控制器 Synch Switcher Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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