lm2770sdx-12157 National Semiconductor Corporation, lm2770sdx-12157 Datasheet - Page 8

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

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Typical Performance Characteristics
1.0µF, C
V
CH1: C
CH2: C
Time scale: 4µs/Div
IN
= 3.6V, V
OUT
IN
IN
= C
= C
= 10µF, T
Load Regulation: V
OUT
OUT
OUT
Load Regulation: V
= 1.5V, I
= 2x10µF; C1 = C2 = 1µF; Scale: 50mV/Div
= 10µF; C1 = C2 = 1µF; Scale: 50mV/Div
Input Voltage RIpple
A
OUT
= 25
= 200mA
o
C. Capacitors are low-ESR multi-layer ceramic capacitors (MLCC’s). (Continued)
OUT
OUT
= 1.575V
= 1.2V
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Unless otherwise specified: C
8
V
CH1: C
CH2: C
Time scale: 4µs/Div
V
CH1: EN pin; Scale: 1V/Div
CH2: V
Time scale: 40µs/Div
IN
IN
= 3.6V, V
= 3.6V, V
OUT
IN
IN
= C
= C
; Scale: 500mV/Div
OUT
OUT
OUT
OUT
Load Regulation: V
= 1.5V, I
= 1.5V, Load = 7.5Ω (200mA)
= 2x10µF; C1 = C2 = 1µF; Scale: 50mV/Div
= 10µF; C1 = C2 = 1µF; Scale: 50mV/Div
Output Voltage Ripple
Start-up Behavior
OUT
IN
= 200mA
= 10µF, C1 = 1.0µF, C2 =
OUT
= 1.5V
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