lm2770sdx-12157 National Semiconductor Corporation, lm2770sdx-12157 Datasheet - Page 4

• Manufacturer Part Number: lm2770sdx-12157
• Description: High Efficiency Switched Capacitor Step-down Dc/dc Regulator With Sleep Mode
• Manufacturer: National Semiconductor Corporation

www.national.com
V
V
Specifications Below Apply to All LM2770 Options
E
E
I
I
I
I
t
F
Logic Pin Specifications: EN, ENA, ENB
V
V
I
I
I
Q
SLEEP
SD
CL
ON
IH
IH-EN
IL
SW
LDO-1215
LDO-12157
AVG
IL
IH
Electrical Characteristics
Symbol
Limits in standard typeface are for T
(-30˚C ≤ T
= 3.6V; V(EN) = V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of
the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
T
Note 4: Short circuit protection circuitry protects the part from immediate destructive failure when V
output may shorten the lifetime of the device.
Note 5: For detailed information on soldering requirements and recommendations, please refer to National Semiconductor’s Application Note 1187 (AN-1187):
Leadless Leadframe Package (LLP).
Note 6: The Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7
J
=140
o
C (typ.).
J
LM2770-1215:
1.5V Output Voltage Regulation
- SLEEP Mode
LM2770-1215:
1.2V Output Voltage Regulation
- SLEEP Mode
LM2770-12157:
1.575V Output Voltage
Regulation - SLEEP Mode
LM2770-12157:
1.2V Output Voltage Regulation
- SLEEP Mode
Power Efficiency
Average Eficiency over Li-Ion
Input Voltage Range (Note 11)
Quiescent Supply Current:
Full-power Mode
Quiescent Supply Current:
Sleep Mode
Shutdown Current
Current Limit - Sleep Mode
Turn-on Time
Switching Frequency
Logic-low Input Voltage
Logic-high Input Voltage
Logic-high Input Current:
SLEEP and V
Logic-high Input Current: EN pin
(Note 12)
Logic-low Input Current: All
Logic Pins
≤ +105˚C) . Unless otherwise noted, specifications apply to the LM2770 Typical Application Circuit (pg. 1) with: V
SEL
Parameter
= 1.8V, V(SLEEP) = 0V, C
SEL
pins
J
= 25
o
(Notes 2, 9) (Continued)
C. Limits in boldface type apply over the full operating junction temperature range
3.0V ≤ V
0mA ≤ I
V
3.0V ≤ V
0mA ≤ I
V
3.0V ≤ V
0mA ≤ I
V
3.0V ≤ V
0mA ≤ I
V
V
V
3.0V ≤ V
I
2.7V ≤ V
I
V(SLEEP) = 0V
2.7V ≤ V
I
V(SLEEP) = 1.8V
2.7V ≤ V
V(EN) = 0V
0V ≤ V
V(SLEEP) = 1.8V
V
2.7V ≤ V
2.7V ≤ V
2.7V ≤ V
Logic Input = 3.0V
V(EN) = 1.8V
Logic Input = 0V
OUT
OUT
OUT
SEL
SEL
SEL
SEL
IN
OUT
IN
= 3.6V, I
= 3.6V, C
IN
= 0V, V(SLEEP) = 1.8V
= 0V, V(SLEEP) = 1.8V
= 200mA, V
= 0mA
= 0mA
= 0V, V(SLEEP) = 1.8V
= 0V, V(SLEEP) = 1.8V
=1.5V
= C
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
≤ 5.5V,
≤ 5.5V,
≤ 5.5V,
≤ 5.5V,
≤ 4.2V
≤ 5.5V
≤ 5.5V
≤ 5.5V
≤ 0.2V
≤ 5.5V
≤ 5.5V
≤ 5.5V
≤ 20mA,
≤ 20mA,
≤ 20mA,
≤ 20mA,
OUT
OUT
= 10µF, C
= 150mA
OUT
4
= 10µF
Condition
= 1.5V
1
= C
2
= 1.0µF. (Note 10)
OUT
is shorted to GND. Applying a continuous GND short to the
1.435
1.145
1.520
1.150
Min
475
1.0
0
J
=150
1.495
1.205
1.575
1.210
Typ
200
700
0.1
0.1
o
82
73
55
50
60
C (typ.) and disengages at
6
0
1.555
1.265
1.630
1.270
Max
925
0.5
0.4
V
75
65
IN
Units
kHz
mA
µA
µA
µA
µA
µA
µA
µs
%
%
V
V
V
V
IN