S85S1A Datasheet, PDF (22/30 Pages) Seiko Instruments Inc – 5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT
S-85S1A Series
Rev.1.2_00
3. 4 Load fluctuation (V_OUT = 1.8 V, V_IN = 3.6 V, Ta = +25°C)
3. 4. 1
30
20
10
0
I_OUT = 0.1 mA → 10 mA → 0.1 mA
2.00
1.95
1.90
IOUT
1.85
3. 4. 2
300
200
100
0
I_OUT = 0.1 mA → 200 mA → 0.1 mA
IOUT
2.00
1.95
1.90
1.85
10
VOUT ^1.80
20
1.75
30
1.70
0.0 0.2 0.4 0.6 0.8 1.0
Time [ms]
100
200
1.80
VOUT _1.75
300
1.70
0.0 0.2 0.4 0.6 0.8 1.0
Time [ms]
 Reference Data
The external parts shown in Table 14 are used in " Reference Data".
Condition
Inductor (L)
<1>
GLUHK2R201A (2.2 μH)
ALPS ELECTRIC CO., LTD
<2>
DFE201210S (2.2 μH)
Toko Ink.
Table 14
Input Capacitor (C_IN)
C1005X5R0J106M050BC (10 μF)
TDK Corporation
C1005X5R0J106M050BC (10 μF)
TDK Corporation
Output Capacitor (C_OUT)
C1005X5R0J106M050BC (10 μF)
TDK Corporation
C1005X5R0J106M050BC (10 μF)
TDK Corporation
1. V_OUT = 1.2 V (External parts: Condition<1>)
1. 1 Efficiency (η) vs. Output current (I_OUT)
100
80
60
VIN = 3.6 V
40
VIN = 5.5 V
20
0
0.001 0.01 0.1 1
10 100
IOUT [mA]
2. V_OUT = 1.8 V (External parts: Condition<1>)
2. 1 Efficiency (η) vs. Output current (I_OUT)
100
80
60
VIN = 3.6 V
40
VIN = 5.5 V
20
0
0.001 0.01 0.1 1
10 100
IOUT [mA]
1. 2 Output voltage (V_OUT) vs. Output current (I_OUT)
1.5
1.4
VIN = 5.5 V
1.3
1.2
1.1
VIN = 3.6 V
1.0
0.001 0.01 0.1 1
10 100
IOUT [mA]
2. 2 Output voltage (V_OUT) vs. Output current (I_OUT)
2.0
VIN = 5.5 V
1.9
1.8
1.7
VIN = 3.6 V
1.6
1.5
0.001 0.01 0.1 1
10 100
IOUT [mA]
22