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參數(shù)資料
| 型號(hào)： | TPS62000YZG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, BGA12 |
| 封裝： | DSBGA-12 |
| 文件頁數(shù)： | 24/29頁 |
| 文件大小： | 744K |
| 代理商： | TPS62000YZG |
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TPS62000, TPS62001, TPS62002, TPS62003
TPS62004, TPS62005, TPS62006, TPS62007, TPS62008
HIGHEFFICIENCY STEPDOWN LOW POWER DCDC CONVERTER
SLVS294D SEPTEMBER 2000 REVISED MARCH 2006
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
NAME
DGS
YEG
I/O
DESCRIPTION
EN
8
B3
I
Enable. A logic high enables the converter, logic low forces the device into shutdown mode reducing the
supply current to less than 1
A.
FB
5
A2
I
Feedback pin for the fixed output voltage option. For the adjustable version an external resistive divider is
connected to FB. The internal voltage divider is disabled for the adjustable version.
FC
2
C1
Supply bypass pin. A 0.1
F coupling capacitor should be connected as close as possible to this pin for good
high frequency input voltage supply filtering.
GND
3
A1
Ground
ILIM
6
A3
I
Switch current limit. Connect ILIM to GND to set the switch current limit to typically 600 mA, or connect this
pin to VIN to set the current limit to typically 1200 mA.
L
9
C2,
C3
I/O
Connect the inductor to this pin. L is the switch pin connected to the drain of the internal power MOSFETS.
PG
4
B1
O
Power good comparator output. This is an open-drain output. A pullup resistor should be connected
between PG and VO. The output goes active high when the output voltage is greater than 92% of the nominal
value.
PGND
10
D2
Power ground. Connect all power grounds to PGND.
SYNC
7
D3
I
Input for synchronization to external clock signal. Synchronizes the converter switching frequency to an
external clock signal with CMOS level:
SYNC = HIGH: Low-noise mode enabled, fixed frequency PWM operation is forced
SYNC = LOW (GND): Power save mode enabled, PFM/PWM mode enabled.
VIN
1
D1
I
Supply voltage input
NC
B2
Not connected
detailed description
operation
The TPS6200x is a step down converter operating in a current mode PFM/PWM scheme with a typical switching
frequency of 750 kHz.
At moderate to heavy loads, the converter operates in the pulse width modulation (PWM) and at light loads the
converter enters a power save mode (pulse frequency modulation) to keep the efficiency high.
In the PWM mode operation, the part operates at a fixed frequency of 750 kHz. At the beginning of each clock
cycle, the high side P-channel MOSFET is turned on. The current in the inductor ramps up and is sensed via
an internal circuit. The high side switch is turned off when the sensed current causes the PFM/PWM comparator
to trip when the output voltage is in regulation or when the inductor current reaches the current limit (set by ILIM).
After a minimum dead time preventing shoot through current, the low side N-channel MOSFET is turned on and
the current ramps down again. As the clock cycle is completed, the low side switch is turned off and the next
clock cycle starts.
In discontinuous conduction mode (DCM), the inductor current ramps to zero before the end of each clock cycle.
In order to increase the efficiency the load comparator turns off the low side MOSFET before the inductor current
becomes negative. This prevents reverse current flowing from the output capacitor through the inductor and
low side MOSFET to ground that would cause additional losses.
As the load current decreases and the peak inductor current does not reach the power save mode threshold
of typically 120 mA for more than 15 clock cycles, the converter enters a pulse frequency modulation (PFM)
mode.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS62000YZGR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Adj 600-mA 95% Eff Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS62000YZGT | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Adj 600-mA 95% Eff Step-Down Conv RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS62001DGS | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 0.9V Out 600mA Step-Down Con RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62001DGSG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 0.9V Out 600mA Step-Down Con RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62001DGSR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 0.9V Out 600mA Step-Down Con RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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