參數(shù)資料
型號: LM2794BL/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHED CAPACITOR REGULATOR, 675 kHz SWITCHING FREQ-MAX, PBGA14
封裝: LEAD FREE, CSP-14
文件頁數(shù): 11/16頁
文件大?。?/td> 487K
代理商: LM2794BL/NOPB
Electrical Characteristics (Continued)
Limits in standard typeface are for T
J = 25C and limits in boldface type apply over the full Operating Junction Temperature
Range (30C
≤ T
J
≤ +100C). Unless otherwise specified, C1 = C2 = C
IN =CHOLD = 1 F, VIN = 3.6V, BRGT pin = 0V; RSET
=124
; LM2794:V
SD =VIN (LM2795: VSD = 0V).
Symbol
Parameter
Conditions
Min
Typ
Max
Units
f
SW
Switching Frequency (Note 6)
3.0V
≤ V
IN
≤ 4.4V
325
515
675
kHz
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ=150C (typ.) and disengages at
TJ=140C (typ.). D1, D2, D3 and D4 may be shorted to GND without damage. POUT may be shorted to GND for 1sec without damage.
Note 3: The value of
θJA is based on a two layer evaluation board with a dimension of 2in. x1.5in.
Note 4: In the test circuit, all capacitors are 1.0F, 0.3
maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce output
voltage and efficiency.
Note 5: Voltage at which the device switches from charge-pump mode to pass mode or pass mode to charge-pump mode. For example, during pass mode the
device output (Pout) follows the input voltage.
Note 6: The output switches operate at one eigth of the oscillator frequency, fOSC = 1/8fSW.
LM2794/LM2795
www.national.com
4
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