LP2981/LP2985/LP2985LV
Ultra-low dropout regulator with shutdown
Features
Target Applications
• Wide VIN range: 2.2 V to 16 V
• Stable with ceramic capacitors (LP2985, LP2985LV)
• Notebooks, desktop PCs
• PC peripheral cards
• Very low dropout voltage, typically:
• 70 mV at 25 mA
• PDAs, mobile phones, palmtops
• Telecommunications/modems
• Media players
• Digital still cameras, VCRs, camcorders
• Storage card and system
• Industrial/automotive
• 200 mV at 100 mA
• 280 mV at 150 mA
• Output tolerance (LP2981/LP2985):
• 0.75%/1% (A grade)
• 1.25%/1.5% (standard grade)
• Low noise: 30 µV (300 Hz to 50 kHz) (LP2985, LP2985LV)
• Wide operating temperature range (Tj): –40°C to 125°C
• Low quiescent current in shutdown: 0.01 µA (typ)
• Overcurrent and thermal protection
Package Pinouts
LP2985A-xxDBVR
(SOT-23)
• High peak current capability
V
1
2
3
55
V
IN
OUT
1 µF
2.2 µF
Voltage Nodes
GND
• LP2981: Adj, 1.25, 1.8, 2.5, 2.7, 2.8,* 2.9, 3.0, 3.2, 3.3* and 5 V
• LP2985: 2.5, 2.6, 2.7, 2.8,* 2.85, 3.0, 3.1, 3.2, 3.3* and 5 V
• LP2985LV: 1.25, 1.5, 1.7, 1.8 and 2.0 V
Bypass
10 nF
On/Off
44
Output Current
• LP2981: 100 mA
• LP2985 and LP2985LV: 150 mA
LP2985A-xxYEQ/YZQ
(WCSP)
Package Options
V
V
IN
OUT
• SOT-23 (DBV)
• WCSP (YEQ, YEU, YZQ, YZU)**
* Currently released
2.2 µF
1 µF
On/Off
** YZQ/YZU = Lead (Pb)-Free, YEU/YZU = 0.30-mm bump, YEQ/YZQ = 0.17-mm bump
Bypass
10 nF
Comparison Between SOT-23 and WCSP Devices
0.0408
(1,037)
5-ball
0.118
(3,00)
NanoStarTM (YEU/YEQ)
5-pin
SOT-23 (DBV)
Lead pitch = 0.037 (0,95)
Height = 0.047 (1,20)
Area = 0.014 (9)
NanoFreeTM (YZU/YZQ)
Ball pitch = 0.020 (0,50)
Height = 0.0246 (0,625)
Area = 0.0021 (1,386)
0.0526
(1,337)
0.118
(3,00)
Dimensions in inches (millimeters)
SOT-23
WCSP
R E L I A B L E.
L O G I C.
I N N O V A T I O N.TM