S-8533 Datasheet, PDF (6/31 Pages) Seiko Instruments Inc – STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER

STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8533 Series
Rev.2.3_00
„ Electrical Characteristics
Table 3
V_IN = V_OUT × 1.5 V, I_OUT = V_OUT/50 A (In case V_OUT ≤ 1.8 V, V_IN = 2.7 V) (Ta = 25°C unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Measurement
Unit
Circuit
Output voltage^*1
V_OUT(E)
−
V_OUT(S)
× 0.98
V_OUT(S)
V_OUT(S)
× 1.02
V
2
Input voltage
V_IN
Current consumption 1 I_SS1
−
No external parts, V_OUT = V_OUT(S) × 0.95
(Duty ratio 100%)
2.7
−
16.0
V
1
−
30
70
μA
1
Current consumption
during power-off
I_SSS
V_ON/OFF = 0 V
−
−
1.0
μA
1
PDRV pin output current I_PDRVH
No external parts, V_OUT = V_OUT(S) × 1.5,
V_IN = 9.0 V, V_PDRV = V_IN − 0.2 V
−12
−18
−
mA
1
I_PDRVL
No external parts, V_OUT = V_OUT(S) × 0.95,
V_IN = 9.0 V, V_PDRV = 0.2 V
19
27
−
mA
1
NDRV pin output current I_NDRVH
No external parts, V_OUT = V_OUT(S) × 1.5,
V_IN = 9.0 V, V_NDRV = V_IN − 0.2 V
−10
−14
−
mA
1
Line regulation
I_NDRVL
No external parts, V_OUT = V_OUT(S) × 0.95,
V_IN = 9.0 V, V_NDRV = 0.2 V
35
50
−
mA
1
ΔV_OUT1
V_IN = V_OUT(S) × 1.2 to 16 V^*2 S-8533A125,
−
V_OUT(E) V_OUT(E)
V
2
S-8533A13A to 29A
× 1.0% × 2.5%
S-8533A30A to 60A
−
V_OUT(E) V_OUT(E)
V
2
× 1.0% × 2.0%
Load regulation
ΔV_OUT2
I_OUT = 10 μA to I_OUT (see above) × 1.25
−
V_OUT(E) V_OUT(E)
V
2
× 0.5% × 1.0%
Output voltage
temperature coefficient
ΔV_OUT
ΔTa • V_OUT
Ta = −40 to +85°C
−
±100
− ppm/°C
−
Oscillation frequency
f_OSC
Measure waveform at the PDRV pin.
255
300
345
kHz
2
Maximum duty ratio
MaxDuty ^{The same condition as lSS1. Measure waveform at} 100
−
−
%
1
the PDRV pin.
VOUT pin input current I_VOUT
V_OUT = 5.0 V
0.01
0.1
4.0
μA
1
ON/ OFF pin input
V_SH
The same condition as I_SS1.
voltage
V_IN = 2.7 V and check that PDRV pin = "L".
1.8
−
−
V
1
V_SL
The same condition as I_SS1.
V_IN = 16.0 V and check that PDRV pin = "H".
−
−
0.3
V
1
ON/ OFF pin input
I_SH
The same condition as I_SS1. V_ON/OFF = V_IN
−0.1
−
0.1
μA
1
leakage current
I_SL
The same condition as I_SS1. V_ON/OFF = 0 V
−0.1
−
0.1
μA
1
Soft-start time
t_SS
The same condition as I_SS1. Measure time until
5.0
8.0
16.0
ms
1
PDRV pin oscillates.
Efficiency
EFFI
*3, I_OUT = 200 to 400 mA, S-8533A33A
−
94
−
%
3
External parts :
Coil :
Sumida Corporation
CD105 (22 μH)
Diode :
Matsushita Electric Industrial Co., Ltd. MA737 (Schottky diode)
Capacitor :
Nichicon Corporation
F93 (16 V, 47 μF, tantalum) × 2
Transistor :
Toshiba Corporation
2SA1213-Y
Base resistance : 1 kΩ
Base capacitor : 2200 pF
C_SS :
4700 pF
C_NDRV :
1000 pF
*1. V_OUT(S) : Nominal output voltage value
V_OUT(E) : Actual output voltage value : V_IN = V_OUT × 1.5 V, I_OUT = V_OUT/50 A (If V_OUT ≤ 1.8 V, V_IN = 2.7 V.)
*2. In case V_OUT(S) ≤ 2.2 V, V_IN = 2.7 to 16 V
*3. External parts
Coil :
Sumida Corporation CDRH104R (22 μH)
Capacitor :
Nichicon Corporation F93 (16 V, 47 μF, tantalum) × 2
P-channel power MOS FET : Sanyo Electric Co., Ltd. CPH6303 (V_GS = 10 V max.)
N-channel power MOS FET : Sanyo Electric Co., Ltd. CPH6403 (V_GS = 10 V max.)
C_SS :
4700 pF
6
Seiko Instruments Inc.