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參數資料
| 型號： | LM2608 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
| 中文描述： | 400mA的超小型，高效率，可編程的DC - DC轉換器與線性模式 |
| 文件頁數： | 5/18頁 |
| 文件大?。?/td> | 728K |
| 代理商： | LM2608 |
Electrical Characteristics
(Continued)
Specifications with standard typeface are for T
= T
= 25C, and those in
bold face type
apply over the full Operating Tem-
perature Range (T
A
= T
J
= 25C to +85C). Unless otherwise specified, PVIN = VDD = EN = SYNC = 3.6V, VSEL = 0V,
VREF = 1.35V.
Symbol
V
SYNC_H
Parameter
Conditions
Min
Typ
Max
Units
SYNC/MODE Positive
Going Threshold Voltage
SYNC/MODE Negative
Going Threshold Voltage
V
SEL
Positive Going
Threshold Voltage
V
SEL
Negative Going
Threshold Voltage
VSEL Pull Down Current
Input current into VREF pin
SYNC/MODE Clock
Frequency Range
(Note 9)
Internal Oscillator
Frequency
Minimum ON-Time of P FET
Switch in PWM Mode
0.85
1.3
V
V
SYNC_L
0.4
0.80
V
V
SEL_H
0.80
1.3
V
V
SEL_L
0.4
0.75
V
I
SEL
I
REF
f
sync
VSEL = 1.2V
0.70
15
2
μA
nA
150
500
1000
kHz
F
OSC
LM2608ATL-1.3/1.8, PWM
Mode
510
610
690
kHz
T
min
200
ns
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended
to be functional, but parameter specifications may not be guaranteed. For guaranteed specifications and associated test conditions, see the Min and Max limits and
Conditions in the Electrical Characteristics table. Electrical Characteristics table limits are guaranteed by production testing, design or correlation using standard
Statistical Quality Control methods. Typical (Typ) specifications are mean or average values from characterization at 25C and are not guaranteed.
Note 2:
Thermal shutdown will occur if the junction temperature exceeds the 150C maximum junction temperature of the device.
Note 3:
Thermal resistance specified with 2 layer PCB(0.5/0.5 oz. cu).
Note 4:
The LM2608 is designed for cell phone applications where turn-on after system power-up is controlled by the system processor and internal UVLO (Under
Voltage LockOut) circuitry is unnecessary. The LM2608 has no UVLO circuitry and should be kept in shutdown by holding the EN pin low until the input voltage
exceeds 2.8V. Although the LM2608 exhibits safe behavior while enabled at low input voltages, this is not guaranteed.
Note 5:
The LM2608 PWM mode output voltage precision is
±
1% when operating from an external 1.35V reference voltage.
Note 6:
The hysteresis voltage is the minimum voltage swing on FB that causes the internal feedback and control circuitry to turn the internal PFET switch on and
then off, during test mode.
Note 7:
Current limit is built-in, fixed, and not adjustable. If the current limit is reached while the output is pulled below about 0.7V, the internal PFET switch turns
off for 2.5 μs to allow the inductor current to diminish.
Note 8:
EN is a Schmitt trigger digital input with logic thresholds that are independent of supply voltage at the VDD pin.
Note 9:
SYNC driven with an external clock switching between VDD and GND. When an external clock is present at SYNC, the IC is forced into PWM mode at the
external clock frequency. The LM2608 synchronizes to the rising edge of the external clock.
L
www.national.com
5
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PDF描述 |
|---|---|
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| LM2608ATLX-1.3 | 400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
| LM2608ATLX-1.8 | 400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
| LM2612ABLX | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GTS; No. of Contacts:17; Connector Shell Size:20; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2608ATL-1.3 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
| LM2608ATL-1.3/NOPB | 功能描述:IC REG BUCK SYNC 0.3A 10USMD RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM2608ATL-1.8 | 功能描述:IC REG BUCK SYNC 0.4A 10USMD RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM2608ATLX-1.3 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
| LM2608ATLX-1.8 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
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