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參數(shù)資料
| 型號： | TPS62103DG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, SOIC-8 |
| 文件頁數(shù)： | 21/27頁 |
| 文件大?。?/td> | 537K |
| 代理商： | TPS62103DG4 |
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TPS62100, TPS62101, TPS62102, TPS62103
MULTIMODE LOW POWER BUCK CONVERTER
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
VIN input supply voltage
–0.3 V to 10 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SD/SYNC input voltage
–0.3 V to VIN + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODE input voltage
–0.3 V to VIN + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMP input voltage
–0.3 V to 10 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SW output voltage
–0.3 V to VIN + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SW output current
1.6 A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating junction temperature
–40
°C to +150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature
–65
°C to +150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Unless otherwise noted, voltages are reference to ground and currents are positive into and negative out of the specified terminals. Pulsed is
defined as a less than 10% duty cycle with a maximum duration of 500
s. Consult the Packaging Section of the Portable Products Data Book
(TI Literature No. SLUD001) for thermal limitations and considerations of the package.
recommended operating conditions
MIN
MAX
UNIT
Input voltage, VIN, SD/SYNC, MODE
9
V
Regulated output voltage
8
V
Average output current, IOUTw
500
mA
Operating junction temperature, TJw
–40
85
°C
§ It is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time.
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
COMP
5
O
Output of the error amplifier. The loop compensation network connects between this pin and FB. When the
converter enters the light-load mode, this pin goes into a high-impedance state..
FB
6
I
Feedback voltage input. In the constant-frequency mode, the output duty cycle is varied to keep this pin at
800 mV. In light-load mode, this pin is kept between 785 mV and 815 mV. If this pin falls below 770 mV while
the converter is in auto mode and light-load mode, the converter re-enters the constant-frequency mode.
AGND
4
Reference point for the internal reference and all thresholds, as well as the return for the remainder of the
device.
MODE
3
I
This pin allows the user to program the IC into one of three operating modes. Driving the pin high forces the
converter into the constant-frequency mode. Driving the pin low forces it into the low-power mode. Letting the
pin float puts the converter into the auto mode.
PGND
7
Return for all high-level currents.
SD/SYNC
2
I
This dual function pin serves as the SYNC and SHUTDOWN input. To synchronize the internal clock, this pin
must be driven from 0 V to 2 V. The clock syncs on the rising edge of the input pulse. To shutdown the con-
verter, this pin must be driven high for more than 20
s.
SW
8
O
This is the PWM power output of the converter and is connected to an L-C (inductor-capacitor) filter and a
Schottky catch diode.
VIN
1
I
Input to the converter.
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