LTC1707DFN#PBF [Linear]
IC 1.5 A SWITCHING REGULATOR, 385 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or Controller;
| 型号： | LTC1707DFN#PBF |
| 厂家： | 
Linear |
| 描述： | IC 1.5 A SWITCHING REGULATOR, 385 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or Controller 开关 |
| 文件： | 总2页 (文件大小：57K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DICE/DWF SPECIFICATION
LTC1707
High Efficiency Monolithic
Synchronous Step-Down Switching Regulator
1
8
PAD FUNCTION
DIE CROSS REFERENCE
1. ITH
2. RUN/SS
3. VFB
LTC Finished
Part Number
Order DICE CANDIDATE
Part Number Below
4. GND
5. SW
6. VIN
LTC1707
LTC1707
LTC1707 DICE
LTC1707 DFN
7
7. SYNC/MODE
8. VREF
2
3
4
6
5
4
4
5
210 × 116 mils
W W U W
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage ................................ –0.3V to 10V
ITH Voltage ................................................. –0.3V to 5V
RUN/SS, VFB Voltages ............................... –0.3V to VIN
SYNC/MODE Voltage ................................. –0.3V to VIN
P-Channel Switch Source Current (DC) .............. 800mA
N-Channel Switch Sink Current (DC) .................. 800mA
Peak SW Sink and Source Current ......................... 1.5A
Junction Temperature (Note 2)............................. 125°C
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
1
DICE/DWF SPECIFICATION
LTC1707
W
DICE ELECTRICAL TEST LI ITS
VIN = 5V unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX
60
UNITS
nA
I
Feedback Current
(Note 3)
(Note 3)
VFB
V
Regulated Feedback Voltage
Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
0.78
20
0.82
110
0.01
V
FB
∆V
∆V
V
∆V
= V
– V
FB
mV
%/V
OVL
FB
OVL
OVL
V
= 3V to 8.5V (Note 3)
IN
I
I
Sinking 2µA (Note 3)
Sourcing 2µA (Note 3)
0.8
–0.8
%
%
LOADREG
TH
TH
I
Input DC Bias Current
Pulse Skipping Mode
Burst Mode Operation
Shutdown
(Note 4)
S
V
V
V
V
= 8.5V, V
= 3.3V, V = 0V
SYNC/MODE
µA
µA
µA
µA
IN
ITH
RUN/SS
RUN/SS
OUT
= 0V, V = 8.5V, V = Open
320
35
IN
SYNC/MODE
= 0V, 3V < V < 8.5V
IN
Shutdown
= 0V, V < 3V
IN
V
Run/SS Threshold
V
V
V
Ramping Positive
= 0V
0.4
1.2
0.5
315
1.0
3.3
2.5
385
V
µA
µA
kHz
kHz
RUN/SS
RUN/SS
SYNC/MODE
OSC
RUN/SS
I
I
f
Soft-Start Current Source
SYNC/MODE Pull-Up Current
Oscillator Frequency
RUN/SS
= 0V
SYNC/MODE
V
V
= 0.7V
= 0V
FB
FB
V
Undervoltage Lockout
V
V
Ramping Down from 3V (0°C to 70°C)
Ramping Up from 0V (0°C to 70°C)
2.55
2.60
2.85
3.00
V
V
UVLO
IN
IN
V
V
Ramping Down from 3V (–40°C to 85°C)
Ramping Up from 0V (–40°C to 85°C)
2.45
2.50
2.85
3.00
V
V
IN
IN
R
R
R
R
of P-Channel FET
of N-Channel FET
I
I
= –100mA
= –100mA
0.7
0.8
Ω
Ω
PFET
NFET
DS(ON)
DS(ON)
SW
SW
I
I
Peak Inductor Current
SW Leakage
V
V
= 4V, I = 1.4V, Duty Cycle < 40%
0.70
1.10
±1000
1.202
15
A
PK
LSW
IN
TH
= 0V
nA
mV
mV
RUN/SS
V
Reference Output Voltage
Reference Output Load Regulation
I
= 0µA
REF
1.178
REF
∆V
0V ≤ I
≤ 100µA
REF
REF
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 3: The LTC1707 is tested in a feedback loop that servos V to the
FB
balance point for the error amplifier (V = 0.8V).
ITH
Note 2: T is calculated from the ambient temperature T and power
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
J
A
dissipation P according to the following formula:
D
T = T + (P • θ
)
JA
J
A
D
LT/LT 0605 PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
2
●
●
© LINEAR TECHNOLOGY CORPORATION 2005
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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